View source for RC Update and Run plan for Sep 12,2020

= RC Meeting Information =
<b>RC Daily Meetings are M-F at 4:15 PM</b>
 To join the Meeting:  https://bluejeans.com/861439920
 To join via phone :  +1.408.740.7256 (US (San Jose)), +1.888.240.2560 (US Toll Free))

<b> Saturday 12 Sept 2020. </b>

=General updates=
(See [[D2n_Run_Plan_2020|d2n Run Plan 2020]] for broader status/overview.)
* Down from 2pm until 9pm for an RF klystron replacement [https://logbooks.jlab.org/entry/3846701]
** Used this time to make an opportunistic access to swap Moller control cards in iochc10 to a new VME crate, system is back up now [https://logbooks.jlab.org/entry/3846747]
* Production running on Transverse target (@ 90); Kin-C, Kin-Z continues.
** General plan when this is done is to complete Kin-A, Kin-X (partially done already); then move on to Kin-B/Y and/or 1-pass running as time allows.
* Will move to Kin-A, Kin-X on Sunday and finish 90-deg running there
* Target should be rotated to 270 deg on Monday
* Max Target Tommy polarization @ 90 since yesterday has been 38.5% [https://logbooks.jlab.org/entry/3845852], it seems to have plateaued at 37% today [https://logbooks.jlab.org/entry/3846692], [https://logbooks.jlab.org/entry/3846581]
** For comparison, maximum seen with target at 90 deg last week was 44% (9/5/2020 22:56:38)
** FWIW, that is similar to the maximum seen at 270 was 37.5% [https://logbooks.jlab.org/entry/3844366]; Recent max around 36% (Thursday) [https://logbooks.jlab.org/entry/3845243]
* Moller measurement completed Friday 86.1% [https://logbooks.jlab.org/entry/3846252], (incl. 0.9% bleedthrough correction from Hall A)
* Significant down during Friday swing due to problem with iochc10 IOC which handles Moller controls, magnet cryo, etc
** Found to be in boot, crash, reboot loop [https://logbooks.jlab.org/entry/3846242], hardware and software investigations (including Software On-Call) ultimlately unsuccessful [https://logbooks.jlab.org/entry/3846365].  System went down again in Owl [https://logbooks.jlab.org/entry/3846525]

* Junhao reports the spectrum analyzer parts are ready to go for Monday
** RadCon has been looped in and will support

== Notes for the Future ==
* Beam Studies planned for '''Monday''' @ 10am to 6pm (including recovery), Sept 14
** RadCon will support going to CA at 10am, we can stay in CA for roughly 2 hours; OPS wants Hall C dump available after that
** Simona wants access at this time for SOLID cherenkov related work
** Target work
*** Install spectrum analyzer collimator
*** Check field at target region for 270 setting, if possible
*** Want to determine field direction at the precision of a few degrees vs the alignment laser
** Bill, Murchhana check compass/field measurements and will report back at Sat RC meeting

* [[D2n_Run_Plan_2020#1-pass_Running|1-pass running]] tentatively scheduled for Sept 17/18
** Hall A would like a specific date soon so they can finalize their end-of-run plans

== Pending Issues ==
* Check EPR calibrations (particularly for 270deg setting, but others too) [Melanie]
* Magnet EPICS PV timeout issue; may have to reboot skylla10 on Monday?
** Some Magnets Channels Lost Connection Briefly [https://logbooks.jlab.org/entry/3846677] (Saturday, 2pm)
** Also had to add more error checking to the angle reporting in the CODA run-start GUI last week too (same softIOC as above)
** 'Heartbeat' issue reported by Steve Lassiter last week
* Target polarization for Tommy @ 270 is low (mid to high 30s)
** Spectrum analyzer collimator was broken at some point and present optics setup may be allowing transient light to interfere with spectrum measurement and QWP scans
** JP wonders if the field direction is off for the transverse settings (Bill, Murchhana: see note in Target group chat from late Thursday)

* Beam energy drifts
** Hall C 5-pass polarization goes down as energy (HALLC:p) goes up [https://logbooks.jlab.org/entry/3844493]

== Opportunistic Jobs/Access ==
* Beam Studies planned for '''Monday''', Sept 14 (Note date change!)
*; Target calibrations / tests
** Just before Moller measurement, and/or other known downtimes
** See [[D2n_Run_Plan_2020#Target_Calibrations_and_Tests]]

= Current Run Plan =

== Saturday SWING &rarr; Sunday OWL ==
* '''Continue''' production data (HMS Kin-C/SHMS Kin-Z) with pol 3He target, '''Transverse/90''' polarization with pNMR/NMR every 5 hrs.

== Sunday DAY &rarr; Monday OWL ==
* '''Monday at 8am''' Move spectrometers to Kin-A, Kin-X and continue Transverse/90 running there
** Update correction coil settings for Kin-X HB field
* Continue production data with pol 3He target, '''Transverse/90''' polarization with pNMR/NMR every 5 hrs.

== Monday DAY &rarr; Monday SWING ==
 '''Tentative; will confirm on Sunday'''
* '''10am''':  Hall C will enter ''Controlled Access'' as planned
** Target work (2 tasks currently planned; RadCon support needed)
***  Replace a spectrum analyzer mounting plate
***  Take a compass measurement of the field at the carbon foil ladder position if possible [TBD]
*** Rotate target to '''Transverse/270'''
** SOLID cherenkov config change (in parallel)
* Lock-up Hall when done and take data (Ref cell, Optics?) until 2nd part of beam studies begin
* '''4:15pm - 9:15pm''':  Beam studies, part 2
** Requires beam to Hall C dump, but no production running will be practical (as I understand it)
* Continue production running in Kin-A, Kin-X at transverse/270 when possible

== Standing Orders ==
*''' ''Change the IHWP at least every 8 hours'' when running on glass cells. Call Halls A and B in advance. If there are any issues, call the RC'''
*''' Ensure that all information in the CODA run-start GUIs is ''correct for every run''!'''
* If beam goes away for more than 3h, or MCC does operations on the beam that may change the beam tune, then move target to '''No Target''' position,
** verify Harps scans at 3H07A and 3H07B are within spec, '''and'''
** ensure beam is stable (with all locks '''ON''') at 0, 0mm before continuing.
** [[Beam_and_Raster_Checkout_for_A1n/d2n_(Short_Procedure)|Beam recovery procedure]] has more detailed procedure if needed.
* New beam positions have been verified and established to be (0,0) mm for all targets.
** Monitor that beam is at (0,0) using the stripchart on the Wall screen and verify no scraping on the glass cells using the Analysis monitor.

* Check the position locks are on.
* Check that CODA is running normally (had one strange hangup lately)
* Check online replays shortly after starting runs, & full replay results too.
* Fill BTA with realistic numbers. You may follow the guidance coming from "load from EPICS", if it does not overestimate the ABU (as it generally does). https://logbooks.jlab.org/entry/3783171. If we have to lower the beam current we actually want because the beam is too unstable, prorate the ABUs. 

 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 !!                                                     !!
 !!  ATTN: SHIFT LEADERS                                !!
 !!     Please follow the shift summary template on     !!
 !!     the laminated SL instructions.                  !!
 !!                                                     !!
 !!  ATTN: TARGET OPERATORS                             !!
 !!  All NMR measurement HCLOG entries should include:  !!
 !!     1) A title that clearly lists polarization      !!
 !!     2) Screenshots of both NMR_FieldSweep and       !!
 !!        the polarization fit                         !!
 !!                                                     !!
 !!     For an example see the following entry:         !!
 !!     https://logbooks.jlab.org/entry/3768696       !!
 !!                                                     !!
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

== Notices in Effect for Shift Crew ==
* Policy for CANS-related hall status change: Make a logbook entry when the hall goes in, or comes out of laser-controlled access.
** Good examples for [https://logbooks.jlab.org/entry/3747393 entering] and [https://logbooks.jlab.org/entry/3747544 leaving] laser access.
* Magnet policies
** Follow the updated guidelines in the [[How-to#Spectrometer_Magnets Spectrometer Magnets]] How to
** Spectrometer GUI (<code>go_magnets</code>) should always be visible on Shift Leader computer, hcdesk3
** If any magnet trips, snapshot the associated power supply window and post it to hclog '''before''' resetting the interlock.
* Monitor the beam position on target and call MCC immediately if you see large excursions (1 mm level).
* When rotating the spectrometer, use HCCAM01 to keep an eye on the SOLID Cherenkov test stand when rotating SHMS (in addition to watching the live angle-cam image, etc). The updated rotation instructions are here: https://hallcweb.jlab.org/wiki/index.php/Spectrometer_Rotation#NOTICES_IN_EFFECT

= Useful Links =
[[PolHe3 Polarization Measurements]]

== Misc Links ==
* [[Polarized Helium-3 Experiments | Main Pol He-3 wiki]]
* [https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=HALLC-POL3HE Shift Schedule]
* [https://hallcweb.jlab.org/live_status/snapshots_controls/ Hall-C Controls]
* [https://logbooks.jlab.org/book/hallc Hall-C Logbook]
* [https://cebaf.jlab.org/files/ops/accboard/ MCC White Board]