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version 1.4, 2003/06/19 16:19:41 version 1.5, 2004/09/17 04:06:56
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 \title{How to Set the HMS Magnets} \title{How to Set the HMS Magnets}
 \howtotype{user} % ``expert'', ``user'', ``reference'' \howtotype{user} % ``expert'', ``user'', ``reference''
 %\experiment{Name of experiment} % Optional %\experiment{Name of experiment} % Optional
 \author{Dave Gaskell}  \author{Mike Fowler and Dave Gaskell}
 \category{magnet} % Subject area of this document \category{magnet} % Subject area of this document
 %\maintainer{Name of person maintaining document} % Optional %\maintainer{Name of person maintaining document} % Optional
 \date{\today} % Can use \today as the argument \date{\today} % Can use \today as the argument
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 The HMS magnet settings are calculated using the program ``field03''.  This The HMS magnet settings are calculated using the program ``field03''.  This
 program will provide the needed set--currents for Q1, Q2, and Q3, and the program will provide the needed set--currents for Q1, Q2, and Q3, and the
 needed field for the dipole.  To needed field for the dipole.  To
 access this program, log into cdaqs1 or cdaqs2 as cdaq. Go to the  access this program, log into cdaqs1 or cdaqs3 as cdaq. Go to the
 \texttt{FIELD} directory (\texttt{cd FIELD}) and run \texttt{field03}. An \texttt{FIELD} directory (\texttt{cd FIELD}) and run \texttt{field03}. An
 example follows:\\ example follows:\\
 \vspace*{0.2in}\\ \vspace*{0.2in}\\
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 \subsection{Set the dipole}\label{setdipole} \subsection{Set the dipole}\label{setdipole}
  
 The dipole can be set in three modes: current control, manual NMR field  The dipole can be set in three modes: Current Control, Manual NMR Field
 control, and automatic NMR controlled ramp.  The default method is at the  Control, and Automatic NMR Controlled Ramp.  The default method is at the
 discretion of the experiment -- consult your run coordinator.  In this discretion of the experiment -- consult your run coordinator.  In this
 section, setting the dipole using manual NMR field control and automatic NMR  section, setting the dipole using automatic NMR controlled ramp will be discussed.  To switch
 controlled ramp will be discussed.  to another operation mode, the dipole current must be zero.
  
 \subsubsection{Manual NMR Field Control}  
  
 \begin{itemize}  \subsubsection{Automatic NMR Controlled Ramp (Field Regulation Mode) - Starting from Zero}
  
   \begin{itemize}
 \item{Select the dipole screen on the magnet controls console.} \item{Select the dipole screen on the magnet controls console.}
   \item{Press F1 to go to the dipole main menu screen.}
   \item{Check the interlock status in the upper right corner of the main menu. If the interlock
   status field is flashing red:}
  
 \item{Press F1 to go to the dipole main menu screen.  Use the arrow keys to    \begin{itemize}
 move the cursor to the \texttt{NMR manual op.} field - then type \texttt{exe}.}      \item{Using the arrow keys, position the cursor over the \texttt{INTERLOCK} menu item.
         Type \texttt{exe} and press ENTER.}
       \item{Position the cursor over the \texttt{RESET INTERLOCK} menu item. Type
         \texttt{exe} and press ENTER.}
       \item{Press F1 and return to main menu.}
     \end{itemize}
  
 \item{Move the cursor to the \texttt{Field target values} field -  \item{Position the cursor over the \texttt{FIELD REGULATION} menu item - then type
 type \texttt{exe}.}  {\texttt{exe}} and press ENTER.}
  
 \item{Select the \texttt{High} field (type \texttt{exe}) and enter the first 4  \item{Position the cursor over the \texttt{DEFAULT mode} menu item.  Type \texttt{exe}
 digits of the magnetic field and hit enter.  For the example field from  and press ENTER.}
 field03 shown in Section~\ref{field} (0.5497165 T), the first 4 digits are  
 0549 for 0.549.}  
  
 \item{Select the \texttt{Low} field and enter the last 4 digits of the magnetic  \item{Position the cursor over the \texttt{NMR start, PWR on} menu item, type \texttt{exe} and
 field.}  press ENTER.  After approximately one minute the NMR unit is activated.  The NMR is on when the status
   field is white starts on a green background.}
  
 \item{Select the \texttt{Write field target values} field - type \texttt{exe}.}  \item{Position the cursor over the \texttt{Set DEFAULT values} menu item, type \texttt{exe} and press
   ENTER.}
  
 \item{The magnet should start ramping - ramping is complete when the NMR  \item{Position the cursor over the \texttt{high} value menu item, type \texttt{exe} and press ENTER.}
 status bit 5 is 1.}  
  
 \item{Make sure that the \texttt{Auto.measurement} field is on. This is  \item{Type in the first 4 digits of the desired magnetic field and hit ENTER.  For the example field from
 indicated by green highlighted asterisks \texttt{**}. }  field03 shown in Section~\ref{field} (0.5497165 T), the first 4 digits are 0549 for 0.549.}
 If it is not on, you can activate it by typing \texttt{exe} in that field.  
  
 \item{Type \texttt{exe} in the \texttt{Field-ctrl ON} field.}  \item{Position the cursor over the \texttt{low} value menu item, type \texttt{exe} and press ENTER.}
  
 \item{Watch the field for a bit to make sure it settles.  You may have turn  \item{Type in the last 4 digits of the desired magnetic field and hit ENTER. Example: for 0.5497165 T, type
 \texttt{Auto.measurement} on again a few times.}  7165.}
  
 \end{itemize}  \item{Position the cursor over the \texttt{CLOSE} menu item, type \texttt{exe} and press ENTER.}
  
 NOTE: Sometimes, when the magnet is already set and regulating and you wish  \item{Position the cursor over the \texttt{Start Excitation} menu item, type \texttt{exe} and press ENTER.}
 to change the field, the dipole will not start a new excitation when you  
 \texttt{Write field target values}.  If this happens, you can alleviate the  
 problem by briefly turning the NMR off and then on again (the NMR is rather  
 slow to respond when turned off, so be patient when turning it on again).  
  
   \item{The dipole will now follow the excitation curve and ramp to the desired field.}
  
   \end{itemize}
  
 \subsubsection{Automatic NMR Controlled Ramp}  
   \subsubsection{Changing the HMS Dipole Field in Regulation Mode}
  
 \begin{itemize} \begin{itemize}
 \item{Select the dipole screen on the magnet controls console.}  
  
 \item{Press F1 to go to the dipole main menu screen.  Use the arrow keys to  \item{Position the cursor over the \texttt{Set DEFAULT values} menu item, type \texttt{exe} and
 move the cursor to the \texttt{FIELD REGULATION} field - then type  press ENTER.}
 \texttt{exe}.}  
   \item{Position the cursor over the \texttt{high} menu item, type \texttt{exe} and
   press ENTER.}
   
   \item{Type in the first 4 digits of the desired magnetic field and hit ENTER.  For the example field from
   field03 shown in Section~\ref{field} (0.5497165 T), the first 4 digits are 0549 for 0.549.}
   
   \item{Position the cursor over the \texttt{low} value menu item, type \texttt{exe} and press ENTER.}
  
 \item{Make sure the program is set for \texttt{DEFAULT mode}.  Then, move the  \item{Type in the last 4 digits of the desired magnetic field and hit ENTER. Example: for 0.5497165 T, type
 cursor to the \texttt{Set DEFAULTvalues} field - type \texttt{exe}.}  7165.}
  
 \item{Select the \texttt{High} field (type \texttt{exe}) and enter the first 4  \item{Position the cursor over the \texttt{CLOSE} menu item, type \texttt{exe} and press ENTER.}
 digits of the magnetic field and hit enter.  For the example field from  
 field03 shown in Section~\ref{field} (0.5497165 T), the first 4 digits are  
 0549 for 0.549.}  
  
 \item{Select the \texttt{Low} field and enter the last 4 digits of the magnetic  \item{Position the cursor over the \texttt{Start Excitation} menu item, type \texttt{exe} and press ENTER.}
 field.}  
  
 \item{Type \texttt{exe} in the \texttt{Start excitation} field - the magnet  \item{The dipole will now follow the excitation curve and ramp to the desired field.}
 will start ramping.}  \end{itemize}
   
   \subsubsection{HMS Dipole Ramp up-err/ Field crtl-err}
   
   Occasionally the NMR unit terminates the field ramp up/down or terminates the field control.
   When this happens, the \texttt{Ramp up-err} or \texttt{Field  crtl-err} will change to red.
   You should always record any fault indications in the hclog, then perform the following:
  
   \begin{itemize}
   \item{Position the cursor over the \texttt{RESET} menu item next to the error indicator, type
   \texttt{exe} and press ENTER. The NMR unit will continue the ramp up/down or restart
   field control.}
 \end{itemize} \end{itemize}
  
 \section{More information}  \section{More information about the Quadrupoles}
  
 \subsection{Changing the quadrupole polarity}\label{quadpol} \subsection{Changing the quadrupole polarity}\label{quadpol}
  
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 \item{When the magnet reaches zero current, type \texttt{psu:pol:+} or \item{When the magnet reaches zero current, type \texttt{psu:pol:+} or
 \texttt{psu:pol:-} for positive or negative polarity.} \texttt{psu:pol:-} for positive or negative polarity.}
  
 \item{At its new polarity, ramp the magnet to 950 Amps:  \item{At its new polarity, ramp the magnet to its maximum current (Q1=950 Amps, Q2=900 Amps, Q3=850 Amps):
 \texttt{psu:setcur:950.0}.}  \texttt{psu:setcur:xxx.x}.}
  
 \item{You can now ramp the magnet down to the desired current: \item{You can now ramp the magnet down to the desired current:
 \texttt{psu:setcur:xxx.xx}, \texttt{xxx.xx} is the absolute value of the \texttt{psu:setcur:xxx.xx}, \texttt{xxx.xx} is the absolute value of the
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 \end{itemize} \end{itemize}
  
  
 \subsection{Changing the dipole polarity}  \subsection{HMS Quadrupole Interlock Recovery}
   
 DRAFT - This section is still under development!!!  
   
 \begin{itemize}  
   
 \item{To change the dipole, first let the dipole ramp to zero current - this  
 can be accomplished by:}  
   
 \begin{itemize}  
         \item{Typing \texttt{exe} in the \texttt{Stop Excitation} field if you  
         are using the Automatic NMR ramping mode or}  
         \item{Typing \texttt{exe} in the \texttt{NMR OFF} field if you are  
         in NMR Manual operation mode.}  
 \end{itemize}  
   
 \item{You can monitor the dipole current by going to the \texttt{INTERLOCK}  
 page.}  
   
 \item{Once the dipole reaches zero current, type \texttt{exe} in the  
 \texttt{Change polarity} box.  NOTE: It may be necessary to turn the NMR back  
 on before doing this.}  
   
 \item{Once the polarity has changed, set the dipole using the instructions in  
 Section \ref{setdipole}.}  
   
 \end{itemize}  
   
 \subsection{Resetting a HMS Quadrupole Power Supply}  
  
 Occasionally, an HMS quad power supply will trip off because a real or Occasionally, an HMS quad power supply will trip off because a real or
 annoyance power supply fault is sensed. You should always record any fault  annoyance power supply fault is sensed. Prudent checks of the system temperature,
 indications in the hclog. Once you have determined that the fault is not real  pressure, and liquid level are wise. You should always record any fault
   indications in the hclog! Once you have determined that the fault is not real
 or that it has been corrected, and that there is no indication of a quench, or that it has been corrected, and that there is no indication of a quench,
 the power supply may be reset by executing the following commands: the power supply may be reset by executing the following commands:
  
 \begin{itemize} \begin{itemize}
 \item{Type \texttt{psu:setcur:0.0}.}  \item{Type \texttt{psu:setcur:0.0} in the Command Line box.}
 \item{WAIT for the magnet to finish ramping to zero current/field (if it \item{WAIT for the magnet to finish ramping to zero current/field (if it
 hasn't already).} hasn't already).}
 \item{Type \texttt{reset}.} \item{Type \texttt{reset}.}
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 Section~\ref{quad_set}.} Section~\ref{quad_set}.}
 \end{itemize} \end{itemize}
  
 \subsection{Quadrupole Quench/Dump Switch}  \subsection{Quadrupole Quench/Dump Switch Open Interlock}
  
 Recovery from a quadrupole quench can now be done remotely. There is little  Recovery from a quadrupole quench can be done remotely. There is little
 or no possibility of a ``real" quench occurring in the main coils so one or no possibility of a ``real" quench occurring in the main coils so one
 should always reset and continue. Prudent checks of the system temperature, should always reset and continue. Prudent checks of the system temperature,
 pressure and liquid level are wise. There have been real quenches of the trim  pressure and liquid level are wise. You should record any fault indications
   in the hclog! There have been real quenches of the trim
 coils that subsequently cause enough noise to trip the main coil off. There coils that subsequently cause enough noise to trip the main coil off. There
 are other causes of fast discharges but these have all been the result of are other causes of fast discharges but these have all been the result of
 electrical noise or a detection level set too low. There have been no real electrical noise or a detection level set too low. There have been no real
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 dump switch open interlock and main coil quench interlock are shown on the dump switch open interlock and main coil quench interlock are shown on the
 ILK screen of the quadrupole display screen. ILK screen of the quadrupole display screen.
  
 To remotely reset the dump switch type the following commands in the proper  To remotely reset the dump switch execute the following steps in the proper
 order: order:
  
 \begin{itemize} \begin{itemize}
 \item{\texttt{qreset}}  \item{Position the cursor over the {\texttt{ILK}} box and press Enter.}
 \item{\texttt{reset}}  \item{In the Command Line box type \texttt{qreset}.  The Main Coil Quench and/or
 \item{(wait seven minutes)}  the Current Lead Overvoltage interlock will change to green.}
 \item{\texttt{reset}}  %\item{\texttt{reset}}
 \item{\texttt{psu:reset}}  \item{Wait 7 minutes for the Dump Switch Open interlock to change to green.}
 \item{\texttt{psu:on}}  \item{Position the cursor over the {\texttt{PSU}} box and press Enter.}
   \item{Type \texttt{psu:reset}.  The MPS OVERTEMP indicator will turn green.}
   \item{Type \texttt{psu:on} and set the magnet as normal.}
 \end{itemize} \end{itemize}
  
 To manually reset the dump switch at the control rack in the hall (if you have To manually reset the dump switch at the control rack in the hall (if you have
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 \item{Type 'psu:on'. } \item{Type 'psu:on'. }
 \end{itemize} \end{itemize}
  
 \subsection{Dipole Quench Recovery}  
  
 The recovery from a dipole quench ``real or imaginary" can be completely  \subsection{Rebooting the HMS quadrupole computers}
 remote. It is wise to check the coil voltage traces and system temperature,  
 pressure and liquid level before restarting. A restart requires the following  Occasionally, one or more of the magnet control computers will become hung,
 steps.  stop responding, or cease to function.  If this is the case, check the hall
   quadrupole hall probes and dipole NMR readback values on the TV monitors.  If
   they are still at their nominal values, it is NOT necessary to reboot the
   computer right away.  You may wait until some opportune moment, i.e. when
   changing kinematics or when beam may go away for an extended period.
   
   When you do decide to reboot the affected PC, first check the Reboot How--to
   \cite{reboot}.  The steps to follow for the quadrupoles are are summarized below.
  
 \begin{itemize} \begin{itemize}
 \item{Clear interlocks.}  \item{Rebooting the quad computer will crash the magnet so make sure
 \item{Select MPS manual operations.}  you are really ready to reboot!}
 \item{Set desired current or field as before.}  \item{Go to the screen of the affected computer (NumLock-minus-NumLock, etc.).}
 \item{Select ``write set data".}  \item{Go to the reboot panel (on cdaqs1) and reboot that PC.}
   \item{The PC will come up with two ``sections''.  On startup, the cursor will
   be in the bottom (blue?) section.  Get to the top section by hitting the
   \texttt{Esc} key. NOTE: If the display remains blank after the reboot and you do not
   see the startup screen, go to one of the other magnet screens, then back to the screen
   of the affected computer.}
   \item{Now you can move the cursor to the "PSU" box - hit ENTER to get to the PSU screen.}
   \item{The screen will show an "MPS OVERTEMP" fault.  This is OK.}
   \item{If the setcurrent readback value is not 0.0, type \texttt{psu:setcur:0.0} in the Command Line box.
   The MPS not ready will change from ``Not Ready'' to ``Ready'' when the current is zero.}
   \item{Type \texttt{psu:reset}.  MPS OVERTEMP will change to green.}
   \item{Wait 7 minutes or until the MPS OVERTEMP changes to red.}
   \item{Type \texttt{psu:reset}.  The MPS OVERTEMP should change to green. If not, repeat \texttt{psu:reset}.}
   \item{Type \texttt{psu:on} and set the magnet current as you would normally.}
 \end{itemize} \end{itemize}
  
   \section{More information about the Dipole}
  
 The HMS dipole has never had a quench. Even the failure of a current lead in  \subsection{Turning the dipole power supply on}
 October '93 did not quench the coil, according to the Hall C engineering  
 staff. There have been numerous fast/slow discharges and all were due to  
 electrical noise, low trip settings, deliberate operator initiated trips, or  
 interlock dissatisfaction.  
  
 \subsection{Setting the dipole in current control mode}  \begin{itemize}
   \item{In Hall C, unlock the and turn on the dipole main breaker.}
   \item{Turn on the dipole power supply switch located on top of the power supply.}
   \item{Open the center door and press the diode reset button. Close the door.}
   \item{Press RESET to clear the interlocks on the power supply. NOTE: One interlock will remain red.}
   \item{Turn the NMR on.}
   \end{itemize}
  
 Perform the following steps to operate the dipole in current control mode.  \subsection{Changing the dipole polarity}
  
 \begin{itemize} \begin{itemize}
 \item{Unlock the main breaker.}  
 \item{Turn on the Dipole MPS breaker.}  \item{To change the dipole, first let the dipole ramp to zero current - the current can be forced to
 \item{Switch to MPS local.}  ramp down quickly by:}
 \item{Clear all interlock on MPS.}  
 \item{Switch back to MPS remote.}  \begin{itemize}
 \item{Select MPS manual operation from main menu.}          \item{Position the cursor over the \texttt{Interlock} menu item. Type \texttt{exe} and press
 \item{Clear any interlocks.}            ENTER.}
 \item{Select NMR stop and wait $\sim$ 1 min.}          \item{Position the cursor over the \texttt{Fast Discharge by user} menu item. Type \texttt{exe} and
 \item{Select NMR start and wait $\sim$ 1 min.}            press ENTER.}
 \item{If MPS interlock appears, try resetting.}  
 \item{If not clear, then restart NMR and clear.}  
 \item{Enter hi(gh) bit current 0 to 3000 for integer part  
 of the current in Amps.}  
 \item{Enter low bit current 0 to 999 for 0.000 to 0.999 amps.}  
 \item{Change settling time if necessary.}  
 \item{Select ``write data to MPS".}  
 \end{itemize} \end{itemize}
   \item{You can monitor the dipole current in the upper left corner of the \texttt{INTERLOCK}
   page. Wait until the current readback is zero.}
  
 \subsection{Rebooting the magnet control computers}  \item{Position the cursor over the \texttt{Reset Interlock} menu item. Type \texttt{exe} and press ENTER.}
  
 Occassionally, one or more of the magnet control computers will become hung,  \item{Press F1 (function key \# 1) to return to the Main Menu.}
 stop responding, or cease to function.  If this is the case, check the hall  
 quadrupole hall probes and dipole NMR readback values on the TV monitors.  If  
 they are still at their nominal values, it is NOT necessary to reboot the  
 computer right away.  You may wait until some opportune moment, i.e. when  
 changing kinematics or when beam may go away for an extended peiod.  
  
 When you do decide to reboot the affected PC, first check the Reboot How--to  \item{Position the cursor over the \texttt{Field Regulation, NMR Manual op.}, or the \texttt{MPS Manuel op.} menu item,
 \cite{reboot}.  The steps to follow are summarized below.  depending on which mode is being used. Type \texttt{exe} and press ENTER.}
   
   \item{Position the cursor over the \texttt{NMR start, PWR on} menu item. Type \texttt{exe} and press ENTER.
   After approximately one minute the NMR unit is activated.  The NMR is on when the status
   field is white starts on a green background.}
   
   \item{Position the cursor over the \texttt{Change +/-} menu item. Type \texttt{exe} and press ENTER.}
   
   \item{Once the polarity has changed, set the dipole using the instructions in
   Section \ref{setdipole}.}
   
   \end{itemize}
  
 \subsubsection{Rebooting HMS quad computer}  
  
 DRAFT!  STILL IN PROGRESS!!!  \subsection{Dipole Quench Recovery / Interlock Recovery }
   
   The recovery from a dipole quench ``real or imaginary" can be completely remote. It is wise to check the
   coil voltages, system temperature, pressure, and liquid levels before restarting. You should always record
   any fault indications in the hclog! A restart requires the following steps.
   
   \begin{itemize}
   
   \item{Position the cursor over the \texttt{Interlock} menu item. Type \texttt{exe} and press ENTER.}
   \item{Monitor the current value in the upper left corner. Wait until the current read back is zero.}
   \begin{itemize}
      \item{The current can be forced to ramp down quickly. Position the cursor over the \texttt{Fast Discharge by
        user} menu item. Type \texttt{exe} and press ENTER.}
   \end{itemize}
   \item{Position the cursor over the \texttt{Reset Interlock menu item}. Type texttt{exe} and press ENTER.}
   \item{Go to the reboot panel (on cdaqs1) and reset the Dipole Power Supply Diode}
   \item{Press F1 (function key \# 1) to return to the Main Menu.}
   \item{Position the cursor over the \texttt{Field Regulation, NMR Manual op.}, or the \texttt{MPS Manual op.} page,
   depending on the mode of operation being used.}
   \item{Position the cursor over the \texttt{NMR start, PWR on} menu item, type \texttt{exe} and press ENTER.
   After approximately one minute the NMR unit is activated. The NMR is on when the status field is white
   stars on a green background.}
   \item{Set desired current or field.}
   \end{itemize}
   
   The HMS dipole has never had a real quench. Even the failure of a current lead in October '93 did not
   quench the coil, according to the Hall C engineering staff. There have been numerous fast/slow discharges
   and all were due to electrical noise, low trip settings, deliberate operator initiated trips, or interlock
   dissatisfaction.
   
   \subsection{HMS Dipole NMR-err / MPS-err}
   A NMR-err or MPS-err indicates that a communication error has occurred between the control system and
   the NMR unit and/or the Power Supply. You should always record any fault indications in the hclog!
   
   \begin{itemize}
   \item{Set the Magnet alarms (near the target computer) to Bypass.}
   \item{Position the cursor over the \texttt{Interlock} menu item. Type \texttt{exe} and press ENTER.}
   \item{Monitor the current value in the upper left corner. Wait until the current read back is zero.}
   \begin{itemize}
   \item{The current can be forced to ramp down quickly. Position the cursor over the \texttt{Fast Discharge by
   user} menu item. Type \texttt{exe} and press ENTER.}
   \end{itemize}
   \item{Press F1 (function key \# 1) to go to the Main Menu.}
   \item{Position the cursor over the \texttt{Field Regulation, NMR Manual op.}, or the
   \texttt{MPS Manual op.} page, depending on the mode of operation being used. Type \texttt{exe}
   and press ENTER.}
   \item{Position the cursor over the \texttt{RS232 restart} menu item, type \texttt{exe} and press ENTER.}
   \item{Press F7 (function key \# 7) to go to the \texttt{Device} page.}
   \item{Wait for all the devices to restart. }
   \item{Position the cursor over the \texttt{Reset Interlock} menu item. Type \texttt{exe} and press ENTER.}
   \item{Go to the reboot panel (on cdaqs1) and reset the Dipole Power Supply Diode.}
   \item{Press F1 (function key \# 1) to return to the Main Menu.}
   \item{Position the cursor over the \texttt{Field Regulation, NMR Manual op.}, or the \texttt{MPS Manual op.}
    page, depending on the mode of operation being used. Type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{NMR start, PWR on} menu item, type \texttt{exe} and press ENTER.
   After approximately one minute the NMR unit is activated. The NMR is on when the status field
   is white stars on a green background.}
   \item{The field or current may now be set.}
   \item{Set the Magnet alarms (near the target computer) to Active.}
   \end{itemize}
   
   \subsection{Restricting the NMR }
   The NMR unit is very sensitive to electromagnetic interference, so when the unit is searching for the
   magnetic field the unit will try to lock in on a NMR signal without magnetic field. For most cases the NMR
   will simply attempt to lock in on the interference for a short period of time, then give up and continue on.
   However, when ramping the Dipole to high field levels, (0.50 T and above), the NMR unit will try to lock in
   on several interference signals and may never reach the magnet field set point after several Ramp up-err
   resets. When this happens it is possible to restrict the number of probes that the NMR will search and
   improve the probability of obtaining a good field lock. Perform the following steps to restrict the number of
   probes.
   
   NOTE: The procedure only works when the Dipole is at zero amps.
   \begin{itemize}
   \item{Press F1 (function key \# 1) to go to the Main Menu.}
   \item{Position the cursor over the \texttt{NMR manual op.} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Multiplexer} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Number of multiplexer channel} menu item, type
   \texttt{exe} and press ENTER.}
   \item{Type in \texttt{1}, and press ENTER.}
   \item{Position the cursor over the \texttt{Start multiplexer channel} menu item, type \texttt{exe}
    and press ENTER.}
   \item{Type in the probe number from the chart below, and press ENTER.}
   NMR Probes:
   \begin{tabular}{cc}
   Probe \#        &       Range (Tesla)   \\
      2    &       0.09T - 0.26T \\
      3    &       0.17T - 0.52T \\
      4    &       0.35T - 1.05T \\
      5    &       0.70T - 2.10T
   \end{tabular}
   
   \item{Position the cursor over the \texttt{Write field multiplexer parameter} menu item, type \texttt{exe} and press
   ENTER.}
   \item{Position the cursor over the \texttt{NMR stop, PWR off}  menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{NMR start, PWR on} menu item, type \texttt{exe} and press ENTER.}
   
   \end{itemize}
   
   \subsection{Setting the HMS Dipole in current control mode }
   
   Perform the following steps to operate the dipole in current control mode.
   
   \subsubsection{MPS Manual operation: Starting from zero.}
  
 \begin{itemize} \begin{itemize}
 \item{Rebooting the quad computer will crash the magnet so make sure  \item{Press F1 (function key \# 1) to go to the Main Menu.}
 you are really ready to reboot!}  \item{Check the Interlock status, upper right corner of the main menu.
 \item{Go to the screen of the affected computer (NumLock-minus-NumLock, etc.).}  If the interlock status field is flashing red:}
 \item{Go to the reboot panel (on jlabs1) and reboot that PC.}  
 \item{The PC will come up with two ``sections''.  On startup, the cursor will  \begin{itemize}
 be in the bottom (blue?) section.  Get to the top section by hitting the  \item{Using the arrow keys, position the cursor over the \texttt{Interlock} menu item.
 \texttt{Esc} key.}  Type \texttt{exe} and press ENTER.}
 \item{Now you can move the cursor to the "PSU" box - type \texttt{exe} to get  \item{Position the cursor over the \texttt{Reset Interlock} menu item. Type \texttt{exe} and press ENTER.}
 to the PSU screen.}  \item{Press F1 to return to the Main Menu.}
 \item{The screen will likely show an "MPS OVERTEMP" fault.  This is OK.}  \end{itemize}
 \item{If the setcurrent readback value is not 0.0, type  
 \texttt{psu:setcur:0.0}.}  \item{Position the cursor over the MPS Manual op. menu item. Type EXE and press Enter.}
 \item{Wait 5 minutes.}  \item{Position the cursor over the \texttt{NMR start, PWR on} menu item, type \texttt{exe} and press ENTER.
 \item{Type \texttt{reset} and then \texttt{psu:reset}. The ``MPS OVERTEMP''  After approximately one minute the NMR unit is activated.
 fault should go away.  If it does not, repeat \texttt{psu:reset}.}  The NMR is on when the status field is white stars on a green background.. }
 \item{Type \texttt{psu:on} and set the magnet current as you would normally.}  \item{Position the cursor over the \texttt{Set current high} menu item, type \texttt{exe} and press ENTER.}
   \item{Type high current value 0 to 3000 for integer part of the current in Amps, and press ENTER.}
   \item{Position the cursor over the \texttt{Set current low} menu item, type \texttt{exe} and press ENTER.}
   \item{Enter low bit current value 0 to 999 for 0.000 to 0.999 amps.}
   \item{Position the cursor over the \texttt{Automatic measurements} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Write set data} menu item, type \texttt{exe} and press ENTER.}
   \item{The Dipole will now ramp to the desired current.}
   \end{itemize}
   
   \subsubsection{MPS Manual operation: Changing the current value}
   \begin{itemize}
   \item{Position the cursor over the \texttt{Set current high} menu item, type \texttt{exe} and press ENTER.}
   \item{Type high current value 0 to 3000 for integer part of the current in Amps, and press ENTER.}
   \item{Position the cursor over the \texttt{Set current low} menu item, type \texttt{exe} and press ENTER.}
   \item{Enter low bit current value 0 to 999 for 0.000 to 0.999 amps. }
   \item{Position the cursor over the \texttt{Write set data} menu item, type \texttt{exe} and press ENTER.}
   \item{The dipole will now ramp to the new current.}
   \end{itemize}
   
   \subsection{Setting the HMS Dipole in NMR Manual operation }
   
   
   \subsubsection{NMR Manual operation: Starting from zero.}
   \begin{itemize}
   \item{Press F1 (function key \#1) to go to the Main Menu.}
   \item{Check the Interlock status, upper right corner of the main menu.
        If the interlock status field is flashing red:}
   \begin{itemize}
   \item{Using the arrow keys, position the cursor over the \texttt{Interlock} menu item. Type \texttt{exe} and press
   ENTER.}
   \item{Position the cursor over the Reset Interlock menu item. Type \texttt{exe} and press ENTER.}
   \item{Press F1 to return to the Main Menu.}
   \end{itemize}
   \item{Position the cursor over the \texttt{NMR manual op.} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{NMR start, PWR on} menu item, type \texttt{exe} and press ENTER.
   After approximately one minute the NMR unit is activated.
   The NMR is on when the status field is white stars on a green background.}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Field Target Value} menu item, type \texttt{exe} and press ENTER.
   The field target value is a 32 bit word split into two 16 bit words, high and low.}
   \item{Position the cursor over the \texttt{high value} menu item, type \texttt{exe} and press ENTER.}
    \item{Type in the field target value high word, and press ENTER.
   (Example: For 1.2345678 T  type 1234 )}
    \item{Position the cursor over the \texttt{low value} menu item, type \texttt{exe} and press ENTER.
   (Example: For 1.2345678 T  type 5678 )}
   \item{Position the cursor over the Write field target values menu item, type \texttt{exe} and press ENTER.}
   \item{Wait (The dipole power supply will ramp the magnet.
   After the power supply has ramped the magnet, the Searchmode will automatically switch to on.)
   The NMR unit will search for the field, lock on, and calculate the regulation window. When this
   calculation is complete, and if successful, the NMR-status 5 will change to 1, and the auto
   measurements will switch  to manual measurement.) }
   \begin{itemize}
   \item{If the NMR-status 5 displays a value other than 1 visit the web site \\
   \texttt{http://www.jlab.org/$\sim$fowler/nmrstatusie.htm} \\ and enter the NMR register values to obtain
   more details. You should always record any fault indications in the hclog!}
   \end{itemize}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Field-ctrl ON} menu item, type \texttt{exe} and press ENTER.}
   \item{Wait ( The Searchmode will automatically switch on, and the NMR will reacquire field lock.
   The NMR will then make adjustments to the power supply, and if successful, the NMR-status 5
   will change to 1, and the auto measurements will switch to manual measurement.)}
   \begin{itemize}
   \item{If the NMR-status 5 is not set to 1 then an error has occurred.}
   \item{Position the cursor over the Field-ctrl OFF menu item, type \texttt{exe} and press ENTER.}
   \item{Return to the previous step (turn \texttt{Field-ctrl ON}).}
   \end{itemize}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{Wait (It takes approximately three minutes for the NMR to fine tune the field to the set value.
   When the NMR finished, the field the NMR-status 5 will change to 8, and the auto measurements
   will switch to manual measurement.)}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{The Dipole is now ready.}
   \end{itemize}
   
   \subsubsection{NMR Manual operation: Changing the field target value}
   \begin{itemize}
   \item{Position the cursor over the \texttt{Field-ctrl OFF} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Field Target Value} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{high value} menu item, type \texttt{exe} and press ENTER.}
   \item{Type in the field target value high word, and press ENTER.}
   \item{Position the cursor over the \texttt{low value} menu item, type \texttt{exe} and press ENTER.}
   \item{Type in the field target value low word, and press ENTER. }
   \item{Position the cursor over the \texttt{Write field target values} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{Wait (The dipole power supply will ramp the magnet.
   After the power supply has ramped the magnet, the Searchmode will automatically switch to on.)
   The NMR unit will search for the field, lock on, and calculate the regulation window. When this
   calculation is complete, and if successful, the NMR-status 5 will change to 1, and the auto
   measurements will switch  to manual measurement.)}
   \begin{itemize}
   \item{If the NMR-status 5 is not set to 1 visit the web site \\
   \texttt{http://www.jlab.org/$\sim$fowler/nmrstatusie.htm}\\ and enter the NMR register values to obtain
   additional details. You should always record any fault indications in the hclog!}
   \end{itemize}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{Position the cursor over the \texttt{Field-ctrl ON} menu item, type \texttt{exe} and press ENTER.}
   \item{Wait ( The Searchmode will automatically switch on, and the NMR will reacquire field lock.
   The NMR will then make adjustments to the power supply, and if successful, the NMR-status 5
   will change to 1, and the auto measurements will switch to manual measurement.)}
   \begin{itemize}
   \item{If the NMR-status 5 is not set to 1 then an error has occurred.}
   \item{Position the cursor over the \texttt{Field-ctrl OFF} menu item, type \texttt{exe} and press ENTER.}
   \item{Return to the previous step (turn \texttt{Field-ctrl ON}).}
   \end{itemize}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{Wait (It takes approximately three minutes for the NMR to fine tune the field to the set value.
   When the NMR is finished, the NMR-status 5 will change to 8, and the auto measurements will
   switch to manual measurement.)}
   \item{Position the cursor over the \texttt{Auto Measurement} menu item, type \texttt{exe} and press ENTER.}
   \item{The Dipole is now ready.}
 \end{itemize} \end{itemize}
  
 \subsubsection{Rebooting HMS dipole}  \subsection{Rebooting the dipole control computers}
   
   Occasionally, one or more of the magnet control computers will become hung,
   stop responding, or cease to function.  If this is the case, check the hall
   quadrupole hall probes and dipole NMR readback values on the TV monitors.  If
   they are still at their nominal values, it is NOT necessary to reboot the
   computer right away.  You may wait until some opportune moment, i.e. when
   changing kinematics or when beam may go away for an extended period.
  
 DRAFT!  STILL IN PROGRESS!!!  When you do decide to reboot the affected PC, first check the Reboot How--to
   \cite{reboot}.  The steps to follow are summarized below.
  
 \begin{itemize} \begin{itemize}
  
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Line 620 
  
 \item{Go to the dipole screen (NumLock-minus-NumLock, \texttt{D}, \item{Go to the dipole screen (NumLock-minus-NumLock, \texttt{D},
 \texttt{return}.).} \texttt{return}.).}
 \item{Go to the reboot panel (on jlabs1) and reboot the dipole PC.}  \item{Go to the reboot panel (on cdaqs1) and reboot the dipole PC.}
   \item{If the display remains blank after the reboot, go to a quadrupole screen, then
   back to the dipole screen.}
 \item{Once the computer has recovered, type \texttt{hms} at the prompt.  This \item{Once the computer has recovered, type \texttt{hms} at the prompt.  This
 should start the magnet control program.}  will start the magnet control program.}
  
 \end{itemize} \end{itemize}
  
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 % Revision history: % Revision history:
 % $Log$ % $Log$
   % Revision 1.5  2004/09/17 04:06:56  saw
   % Include text from Mike Fowler
   %
 % Revision 1.4  2003/06/19 16:19:41  saw % Revision 1.4  2003/06/19 16:19:41  saw
 % Add wait of 5 minutes after reboot. % Add wait of 5 minutes after reboot.
 % %

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Analyzer/Replay: Mark Jones, Documents: Stephen Wood
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