Difference between revisions of "Commissioning Plan 2017"
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Jump to navigationJump to search| Line 590: | Line 590: | ||
* SHMS Run plan: | * SHMS Run plan: | ||
| − | == Elastic p(ep) Checkout ( | + | == Elastic p(ep) Checkout Small angle (2 hours) == |
* Experts: | * Experts: | ||
* Expected time: | * Expected time: | ||
| Line 597: | Line 597: | ||
{|class="wikitable" style="margin-left: 60px; margin-right: auto; border: none;" | {|class="wikitable" style="margin-left: 60px; margin-right: auto; border: none;" | ||
|- | |- | ||
| − | ! beam current: || | + | ! beam current: || 10 μA |
|- | |- | ||
! fast raster: || 1x1mm2 | ! fast raster: || 1x1mm2 | ||
| Line 607: | Line 607: | ||
! HMS/SHMS trigger: || SCIN 3/4, SCIN 3/4 | ! HMS/SHMS trigger: || SCIN 3/4, SCIN 3/4 | ||
|- | |- | ||
| − | ! HMS angle/momentum || | + | ! HMS angle/momentum || 13.5 deg / 5.398 GeV |
|- | |- | ||
| − | ! SHMS angle/momentum || | + | ! SHMS angle/momentum || 8.,10.,13.5 deg / 6.017,5.814,5.398 GeV |
|} | |} | ||
| − | * | + | * |
| + | == Elastic p(ep) Checkout Larger angle (5 hours) == | ||
| + | * Experts: | ||
| + | * Expected time: | ||
| + | * Goal: | ||
| + | * Conditions: | ||
| + | {|class="wikitable" style="margin-left: 60px; margin-right: auto; border: none;" | ||
| + | |- | ||
| + | ! beam current: || 20 μA or more | ||
| + | |- | ||
| + | ! fast raster: || 1x1mm2 | ||
| + | |- | ||
| + | ! target: || 10cm LH2 | ||
| + | |- | ||
| + | ! HMS/SHMS collimator: || PION , COLLIMATOR | ||
| + | |- | ||
| + | ! HMS/SHMS trigger: || SCIN 3/4, SCIN 3/4 | ||
| + | |- | ||
| + | ! HMS angle/momentum || 16,20,25,30,35 deg / 5.074,4.522,3.911,3.349,2.869 GeV | ||
| + | |- | ||
| + | ! SHMS angle/momentum || 16,20,25,30,35 deg / 5.074,4.522,3.911,3.349,2.869 GeV | ||
| + | |} | ||
| + | * | ||
== HMS/SHMS Angle and Position Matrix Optimization (5 hours)== | == HMS/SHMS Angle and Position Matrix Optimization (5 hours)== | ||
Revision as of 18:46, 10 January 2018
HMS/SHMS Magnet Cycling Procedures
HMS
- Set DIPOLE by NMR coming DOWN 200 A above.
- Set QUADS by initially setting to a current of 200 A above the set currents (or the maximum current of 1100 A for Q1 if set current + 200 > 1100), and then coming DOWN.
- See instructions and limits (do not exceed these limits!!!)
SHMS
- General principal: A magnet will be “on loop” if it has been taken to Imax (11 GeV) and stays on the descending branch of the hysteresis loop. Otherwise it is "off loop"
- Cycle procedure: Go to Imax and descend to target current.
- See instructions and limits (do not exceed these limits!!!)
- Action logic table
| Status/Action | Magnet status is “on loop” | Magnet status is “off loop” |
| Increasing abs(p) at this polarity | Cycle | Cycle |
| Decreasing abs(p) at this polarity | Descend to target current | Cycle |
| Changing polarity | Set to 0 current, switch polarity, cycle | Set to 0 current, switch polarity, cycle |
Beam energy of 2.2 GeV
Initial conditions
- HMS/SHMS angle surveys.
- Beamline BPM and Harp surveys. Check offsets in MCC database.
- HMS/SHMS Conditions:
| HMS/SHMS collimator: | PION , COLLIMATOR |
|---|---|
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 25 deg, -1.6 GeV/c |
| SHMS angle/momentum | 25 deg, -1.6 GeV/c |
- Run 2.2 GeV beam four 4 days and switch to 3 pass.
- Run 6.4 GeV beam and switch to 5 pass.
- Run 10.6 GeV beam.
Completed
Center beam on C-hole target
- Experts:
- Expected time: 1 hour
- Goal: Center beam on carbon hole target
- Conditions:
| beam current: | 5 μA |
|---|---|
| fast raster: | 3x3mm |
| target: | carbon hole |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 25 deg, -1.6 GeV/c |
| SHMS angle/momentum | 25 deg, -1.6 GeV/c |
- Run plan: Procedure
Initial HMS/SHMS Detector Checkout
- SHMS/HMS optics experts:
- HMS DC experts:
- Expected time: 1 hour
- Goal: Initial checkout of the HMS/SHMS detectors. Working well enough for carbon elastics data and initial checkout of the SHMS/HMS tunes.
- Conditions:
| beam current: | 5-20 μA |
|---|---|
| fast raster: | off |
| target: | 0.5% carbon |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4,SCIN 3/4 |
| HMS angle/momentum | 25 deg, -1.6 GeV/c |
| SHMS angle/momentum | 25 deg, -1.6 GeV/c |
- General Run Plan:
- HMS focal plane plots
- SHMS focal plane plots
- HMS physics plots
- SHMS physics plots
- Need to have rough calibration of BCM1 and BCM2.
- First check trigger rates ( SHMS/HMS expects 4kHz/5kHz good electrons at 20uA and )
- Check background triggers rate
- Confirm the HMS DC tracking is working properly and efficiency is high.
- Compare HMS/SHMS focal plane plots to MC simulation.
Wire Chamber
- SHMS Run plan:
- HMS Run plan:
Shower Counter
Scintillator
- SHMS Run plan:
- HMS Run plan:
Cerenkov
- SHMS Heavy Gas Cherenkov: Run Plan
- HMS Run plan:
Aerogel
- SHMS Run plan:Files
Initial checkout of SHMS/HMS tune
- Experts: M Jones, H. Szumila
- Expected time: 1 hour
- Goal: Check tune with sieve
- Conditions:
| beam current: | 5-20 μA |
|---|---|
| fast raster: | off |
| target: | 0.5% carbon |
| HMS/SHMS collimator: | SIEVE , CENTERED SIEVE |
| HMS/SHMS trigger: | SCIN 3/4,SCIN 3/4 |
| HMS angle/momentum | 25 deg, -1.6 GeV/c |
| SHMS angle/momentum | 25 deg, -1.6 GeV/c |
- Plots of focal plane for HMS focal plane and SHMS focal plane
- For SHMS use these plots to help guide the setting of the quadrupoles.
- For HMS sieve, rate 340 Hz at 20uA
- For SHMS sieve, rate of 285 Hz at 20 uA
Beam Energy Measurement
- Experts: MCC,Mark Jones, Dave Mack
- Expected time: 2 hours
- Goal: Measure beam energy for carbon elastics.
- Conditions:
| beam current: | 5uA |
|---|---|
| fast raster: | off |
| target: | none |
- Run Plan: MCC procedure
HMS delta scan with LH2
- Expected time: 5 hour
- Goal: Checkout HMS delta matrix. Have baseline for comparison at higher HMS central momentum
- Conditions:
| beam current: | 3 μA |
|---|---|
| fast raster: | 1x1cm |
| target: | 10cm LH2 |
| HMS collimator: | Pion |
| HMS trigger: | SCIN 3/4 |
| HMS angle/momentum | 13.5 deg, -2.309 to -1.889 GeV/c |
- HMS Run Plan:pdf
Inelastic on 1H at 21.95 degrees
- Experts: S. Malace
- Expected Time: 4 hour
- Goal : Data to compare to known cross sections
- Conditions: Prescale to 2 kHz
| beam current (uA): | 5 |
|---|---|
| fast raster: | 3x3 |
| target: | 10cm LH2, 10cm aluminum |
| HMS collimator: | PION |
| HMS trigger: | SCIN 3/4 |
| HMS angle/momentum | 21.95 / given in table |
- Run Plan:
Eprime suggested time (Hydrogen) suggested time (10 cm Aluminum dummy)
1.6162 20 min 10 min
- Do target boiling and BCM calibration plans listed below. Then continue with the program
Eprime suggested time (Hydrogen) suggested time (10 cm Aluminum dummy)
1.3773 20 min 10 min
1.2000 20 min 10 min
1.0500 20 min 10 min
0.9000 20 min 10 min
Target boiling study
- Experts: Eric Christy
- Expected time: 1.5 hours
- Goal: Measure target boiling.
- Conditions: Prescale to 2 kHz, cycle magnets. Each current a ten minute run.
| beam current (uA): | 1, 3, 5, 7, 10, 12, 15, 17, 20 |
|---|---|
| fast raster: | 3x3mm |
| target: | 10cm LH2, 0.5% Carbon |
| HMS collimator: | PION |
| HMS trigger: | SCIN 3/4 |
| HMS angle/momentum | 21.95 deg, -1.6162 GeV/c |
BCM Calibration
- Experts: Eric Christy
- Expected time: 1 hour
- Goal: BCM Calibration data including low currents to look at non-linearities
- Conditions: Slit closed for zero current
- Procedure: Ask MCC to ramp up and then down covering the currents below with alternating on/off and 2 minutes at each current
| beam currents (uA): | 0, 1, 0, 3, 0, 5, 0, 7, 0, 10, 0, 12, 0, 15, 0, 17, 0, 20 |
|---|---|
| fast raster: | off |
| target: | 0.5% Carbon |
| HMS angle | 21.95 |
| HMS momentum | 1.2 |
Inelastic on 1H at 42.5 degrees
- Experts: S. Malace
- Expected Time: 9 hours
- Goal : Data to compare to known cross sections. Carbon target for pointing at the first momentum.
- Conditions: Prescale to 2 kHz
| beam current (uA): | 10 |
|---|---|
| fast raster: | 3x3 |
| target: | 10cm LH2, 10cm dummy, 0.5% carbon |
| HMS collimator: | PION |
| HMS trigger: | SCIN 3/4 |
| HMS angle/momentum | 42.5 / given in table |
- Run Plan:
Eprime suggested time (Hydrogen) suggested time (10 cm Aluminum dummy) Carbon
1.2000 1 h 10 min 10 min 1.0400 1 h 10 min
0.9200 1 h 10 min
0.8000 1 h 10 min 0.7000 1 h 10 min
0.6000 1 h 10 min
SHMS Delta checkout with Carbon Elastic ground state
- Experts: M. Jones, H. Smuzila
- Expected time: 3 hour
- Goal: To take data with carbon elastic ground state and first excited state to test delta resolution.
- Conditions:
| beam current: | 5-20 μA |
|---|---|
| fast raster: | off |
| target: | 0.5% carbon |
| SHMS collimator: | CENTERED SIEVE |
| SHMS trigger: | SCIN 3/4 |
| SHMS angle/momentum | 7.5 deg, 2.214 GeV/c |
- Run Plan:
HMS Trigger Efficiency study
- Experts: E. Pooser
- Expected Time:
- Goal : To test sensitivity to threshold in the 3/4 and other triggers.
- Need to gain match the HMS Cerenkov according to Hamlet's suggestion elog entry
- Conditions: Parasitic with the HMS Angle/Position Optics Matrix
- Run Plan:
SHMS/HMS Delta Matrix calibration
- Experts: M. Jones, H. Smuzila
- Expected time: 12 hour
- Goal: To
- Conditions:
| beam current: | 5-10 μA (whatever is stable) |
|---|---|
| fast raster: | off |
| target: | 0.5% carbon |
| SHMS collimator: | Collimator |
| SHMS trigger: | SCIN 3/4 |
| SHMS angle/momentum | 7.5 deg, various momentum |
- Run Plan: Scan delta in 2% steps.
- Try with different vertical and horizontal beam positions.
SHMS Quartz bar gain matching
- Experts: S. Malace
- Expected Time: 1 hour
- Goal : Gain match quartz bars.
- Conditions:
| beam current: | 5-10 uA (or more if easily available) |
|---|---|
| fast raster: | 3x3 |
| target: | 10 cm LH2 |
| SHMS | Collimator |
| SHMS trigger: | 3/4 scin |
| SHMS angle/momentum | 25. deg, -1.4 GeV/c |
- Run Plan:
HMS Angle and position matrix optimization for large ytgt (partially completed)
- Experts: M Jones, H Szumila
- Expected time:
- Goal: Calibrate HMS ytgt, yptar and xptar for 10cm target.
- Conditions:
| beam current: | 10 uA (or more if easily available) |
|---|---|
| fast raster: | off |
| target: | Optics #1 target (0,+/-10cm foils) and Optics #2 target (+/-5cm foils) |
| HMS | Sieve |
| HMS trigger: | 3/4 scin |
| HMS angle/momentum | 30. deg, -1.3 GeV/c |
- Run Plan:
- Cycle magnets. Insert sieve.
- MCC will ask for ion chamber calibration on optics #1 and optics #2 target.
- Insert optics #1 target. Take data for 1 hour.
- Insert optics #2 target. Take data for 1 hour.
1H(eep) Coincidence SHMS (proton) and HMS (electron)
- Experts: D. Dutta, S. Basnet, A. Karki
- Expected time: 1 hour
- Goal: Setup coincidence timimg. Kinematic for HEEPcheck. Measure cross section.
- Conditions:
| beam current: | 5-60 μA |
|---|---|
| fast raster: | 3x3mm |
| target: | 10cm LH2, 10cm dummy |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 65.1 deg, -0.936 GeV/c |
| SHMS angle/momentum | 25.0 deg, +2.012 GeV/c |
- Run Plan:
1H(eep) Coincidence SHMS (electron) and HMS (proton)
- Experts: D. Dutta, S. Basnet, A. Karki
- Expected time: 1 hour
- Goal: Setup coincidence timimg. Kinematic for HEEPcheck. Measure cross section.
- Setting 1:
| beam current: | 5-10 μA |
|---|---|
| fast raster: | 3x3mm |
| target: | 10cm LH2, 10cm dummy |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 53.3 deg, +0.957 GeV/c |
| SHMS angle/momentum | 25.0 deg, -1.816 GeV/c |
- Setting 2: Here, we will do a mini-delta-scan in the SHMS to check acceptance.
| beam current: | 5-10 μA |
|---|---|
| fast raster: | 3x3mm |
| target: | 10cm LH2, 10cm dummy |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 47.9 deg, +1.136 GeV/c |
| SHMS angle/momentum (a) | 30.0 deg, -1.816 GeV/c (-7%) |
| SHMS angle/momentum (b) | 30.0 deg, -1.686 GeV/c (0%) |
| SHMS angle/momentum (c) | 30.0 deg, -1.555 GeV/c (8.5)% |
SHMS Angle and Position Matrix Optimization
- Experts:
- Expected time: 2 hour
- Goal: SHMS angle and position matrix optimization
- Conditions:
| beam current: | 5-20 μA |
|---|---|
| fast raster: | off |
| target: | optics target 1, optics target 2 |
| HMS/SHMS collimator: | Sieve , Centered Sieve |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 30. deg, -1.3 GeV/c |
| SHMS angle/momentum | 25 deg, -1.4 GeV/c |
- Run Plan:
Beam energy of 6.4 GeV
Initial conditions
- HMS/SHMS Conditions:
| HMS/SHMS collimator: | PION , COLLIMATOR |
|---|---|
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 15 deg, -3.0 GeV/c |
| SHMS angle/momentum | 15 deg, -3.0 GeV/c |
Beam Checkout with Superharps and Beam Position Monitors (3 hours)
- Experts: Mark Jones, Deb Biswas, Thir Guatam
- Expected time: 3 hours
- Goals: Initial measurement of beam spot size. Followed by calibration of girder BPMs at 5,30 and 60uA. Measure raster size with superharps.
- Conditions:
| beam current: | 5,30 and 60 μA |
|---|---|
| fast raster: | off |
| target: | none |
- Runplan: pdf file
- Ask MCC to do superharp scan with superharps IHA3H07A and IHA3H07B and put entry in ELOG. Record the 3 BPMs positions (3H07A,3H07B,3H07C) during scan.
- Want beam spot with sigma_x and sigma_y below 200 um ( beam pass 1-4) and below 300 um for beam pass 5.
- Verify Girder BPM position to Harp positions.
Center beam on C-hole target ( 1 hour)
- Experts:
- Expected time: 1 hour
- Goal: Center beam on carbon hole target
- Conditions:
| beam current: | 5 μA |
|---|---|
| fast raster: | 3x3mm |
| target: | carbon hole |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 15 deg, -3.0 GeV/c |
| SHMS angle/momentum | 15 deg, -3.0 GeV/c |
- Run plan: Procedure
- Once hole is found, take 20 minutes run at 20uA for good statistics
Detailed Detector Checkout ( 1 hour)
- Experts:
- Expected time: 1 hour
- Prerequisite: Eric Pooser will do invasive checkout of HMS/SHMS trigger with beam.
- Conditions:
| beam current: | 20 μA |
|---|---|
| fast raster: | off |
| target: | 0.5% carbon |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4,SCIN 3/4 |
| HMS angle/momentum | 15 deg, -3.0 GeV/c |
| SHMS angle/momentum | 15 deg, -3.0 GeV/c |
Trigger
- Set HMS/SHMS trigger threshold for PID trigger section to 10 mV.
- Software cuts can be placed on trigger ADC data to study efficiencies.
Wire Chamber
- SHMS Run plan:
- HMS Run plan:
Shower Counter Calibration Run
- SHMS Run plan:
- HMS Run plan:
Scintillator
- SHMS Run plan:
- HMS Run plan:
Cerenkov
- SHMS Heavy Gas Cherenkov: calibration plan
- SHMS Noble Gas Run Plan: Scan of HV ( Eric Pooser)
- HMS Run plan:
Aerogel
- SHMS Run plan:
Elastic p(ep) Checkout Small angle (2 hours)
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 10 μA |
|---|---|
| fast raster: | 1x1mm2 |
| target: | 10cm LH2 |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 13.5 deg / 5.398 GeV |
| SHMS angle/momentum | 8.,10.,13.5 deg / 6.017,5.814,5.398 GeV |
Elastic p(ep) Checkout Larger angle (5 hours)
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 20 μA or more |
|---|---|
| fast raster: | 1x1mm2 |
| target: | 10cm LH2 |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 16,20,25,30,35 deg / 5.074,4.522,3.911,3.349,2.869 GeV |
| SHMS angle/momentum | 16,20,25,30,35 deg / 5.074,4.522,3.911,3.349,2.869 GeV |
HMS/SHMS Angle and Position Matrix Optimization (5 hours)
- Experts:
- Expected time: 5 hours.
- Goal:
- Conditions:
| beam current: | 20 μA ( more is better) |
|---|---|
| fast raster: | off |
| target: | optics targets |
| HMS/SHMS collimator: | Sieve , Centered/Shifted Sieve |
| HMS/SHMS trigger: | 3/4 scin, 3/4 scin |
| HMS angle/momentum | 15 and 22. deg, -3.5 GeV/c |
| SHMS angle/momentum | 15. and 22. deg, -2.8 GeV/c |
- Series of runs changing target.
- SHMS has two sieves with the holes shifted in the horizontal.
- HMS has only one sieve which will always be used.
- No raster.
- Time is assuming 20uA.
| Target | HMS angle | HMS momentum | SHMS angle | SHMS momentum | SHMS collimator | Time |
|---|---|---|---|---|---|---|
| 0,+/- 10cm | 15. deg | 3.5 | 15. deg | 3.5 | Centered Sieve | 30 min |
| 0,+/- 10cm | 15. deg | 3.5 | 15. deg | 3.5 | Shifted Sieve | 30 min |
| +/- 5cm | 15. deg | 3.5 | 15. deg | 3.5 | Centered Sieve | 30 min |
| +/- 5cm | 15. deg | 3.5 | 15. deg | 3.5 | Shifted Sieve | 30 min |
| 0,+/- 10cm | 22. deg | 2.8 | 22. deg | 2.8 | Centered Sieve | 1.5 hr |
| 0,+/- 10cm | 22. deg | 2.8 | 22. deg | 2.8 | Shifted Sieve | 1.5 hr |
Large Ytar: HMS/SHMS Angle and Position Matrix Optimization (9 hours)
- Experts:
- Expected time: 9 hours.
- Goal:
- Conditions:
| beam current: | 20 μA |
|---|---|
| fast raster: | off |
| target: | optics targets |
| HMS/SHMS collimator: | Sieve , Centered Sieve |
| HMS/SHMS trigger: | 3/4 scin, 3/4 scin |
| HMS angle/momentum | 30. deg, -2.0 GeV/c |
| SHMS angle/momentum | 30. deg, -2.0 GeV/c |
Defocused Tune for SHMS ( 1 hour)
- Experts: Hamlet
- Expected time: 1 hr
- Goal: Have a wider y_fp to calibrate the calorimeter over regions that are not usually hit with the standard hourglass tune.
- Conditions:
| beam current: | 5-20 μA |
|---|---|
| fast raster: | 2x2mm |
| target: | 10cm LH2 |
| SHMS collimator: | Collimator |
| SHMS trigger: | SCIN 3/4 |
| SHMS angle/momentum | 25. deg, -3.0 GeV/c, Q2 at 1.2 times normal |
- Run Plan:Documents
Beam Energy Measurement (3 hours)
- Experts: MCC,Mark Jones, Dave Mack
- Expected time: 3 hours
- Goal: Measure beam energy for carbon elastics.
- Conditions:
| beam current: | 5uA |
|---|---|
| fast raster: | off |
| target: | none |
- MCC procedure
Coincidence Checkout [16 hrs]
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 20-50 μA |
|---|---|
| fast raster: | 1x1mm2 |
| target: | 10cm LH2 |
| HMS/SHMS collimator: | PION/SIEVE , COLLIMATOR/CENTERED SIEVE |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 27.5 deg, -3.609 GeV/c |
| SHMS angle/momentum | 27.5 deg, +3.609 GeV/c |
- We will take a set of 1H(e,e’p) measurements to check the angle and dp/p offsets for the spectrometers. Use a current of 50 μA if possible. Rotate both HMS and SHMS to -27.5° again (or keep them there if already at that angle). Keep both HMS and SHMS at a central momentum of -3.609 GeV/c. First use the sieve slit on the SHMS side and the central Carbon optics target. Use the Particle Id. trigger, and measure about 2K singles in SHMS (that should take about one hour). Now install the 10 cm hydrogen target and measure about 2K singles in SHMS (that is again about one hour). Now take a coincidence spectrum in the same situation, again a measurement of about one hour. Remove the sieve slit on the SHMS side and use the large collimator. Measure a coincidence spectrum for one hour (rate should be 4 Hz, so this will get >10K statistics). Now install the sieve slit on the HMS side and measure another coincidence spectrum for a few hours (a few K statistics).
Target boiling study (1.5 hours)
- Experts: Eric Christy
- Expected time: 1.5 hours
- Goal: Measure target boiling.
- Conditions: Prescale to 2 kHz, cycle magnets. Each current a ten minute run.
| beam current (uA): | 1, 3, 5, 7, 10, 12, 15, 17, 20 , max current |
|---|---|
| fast raster: | 3x3mm |
| target: | 10cm LH2, 0.5% Carbon |
| HMS collimator: | PION |
| HMS trigger: | SCIN 3/4 |
| HMS angle/momentum |
BCM Calibration ( 1 hour)
- Experts: Eric Christy
- Expected time: 1 hour
- Goal: BCM Calibration data including low currents to look at non-linearities
- Conditions: Slit closed for zero current
- Procedure: Ask MCC to ramp up and then down covering the currents below with alternating on/off and 2 minutes at each current
| beam currents (uA): | 0, 1, 0, 3, 0, 5, 0, 7, 0, 10, 0, 12, 0, 15, 0, 17, 0, max current |
|---|---|
| fast raster: | off |
| target: | 0.5% Carbon |
| HMS angle | |
| HMS momentum |
12C(eep) [3 hr]
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 20-50 μA |
|---|---|
| fast raster: | 1x1mm2 |
| target: | 3% carbon, 10cm LH2 |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 27.5 deg, -3.609 GeV/c |
| SHMS angle/momentum | 27.5 deg, +3.609 GeV/c |
1H or 12C(e, e’ π) [2 hr]
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 20-50 μA |
|---|---|
| fast raster: | 1x1mm2 |
| target: | 3% carbon, 10cm LH2 |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 16.8 deg, -3.8 GeV/c |
| SHMS angle/momentum | 20.0 deg, +2.7 GeV/c |
1H(e’K) and 1H(e, e’K) [3 hr]
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 20-50 μA |
|---|---|
| fast raster: | 1x1mm2 |
| target: | 10cm LH2 |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | 25.0 deg, -2.6 GeV/c |
| SHMS angle/momentum | 15.0 deg, +3.6 GeV/c |
Use GEM to check out SHMS optics
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | <1 μA |
|---|---|
| fast raster: | off |
| target: | optics targets |
| SHMS collimator: | Collimator |
| SHMS trigger: | 3/4 Scin + Cer |
| SHMS angle/momentum | 25. deg, -2.0 GeV/c |
- Run Plan:
Check spectrometer pointing
- Experts:
- Expected time:
- Goal: Measure the HMS/SHMS spectrometer pointing
- Conditions:
| beam current: | 20-50 μA |
|---|---|
| fast raster: | off |
| target: | 3% carbon |
| HMS/SHMS collimator: | Sieve, Centered sieve |
| HMS/SHMS trigger: | , |
| HMS angle/momentum | 12.-60 deg, -3.0 GeV/c |
| SHMS angle/momentum | 7.5-40 deg, -3.0 GeV/c |
Beam energy of 8.8 GeV
Beam Energy Measurement
- Experts: MCC,Mark Jones, Dave Mack
- Expected time: ? hours
- Goal: Measure beam energy for carbon elastics.
- Conditions:
| beam current: | 5uA |
|---|---|
| fast raster: | off |
| target: | none |
- MCC procedure
SHMS Tune Verification
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 5-20 μA |
|---|---|
| fast raster: | off |
| target: | 3% carbon |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | |
| SHMS angle/momentum |
1H(eep)
Beam energy of 10.6 GeV
Beam Energy Measurement
- Experts: MCC,Mark Jones, Dave Mack
- Expected time: ? hours
- Goal: Measure beam energy for carbon elastics.
- Conditions:
| beam current: | 5uA |
|---|---|
| fast raster: | off |
| target: | none |
- MCC procedure
1H(eep)
SHMS Tune Verification
- Experts:
- Expected time:
- Goal:
- Conditions:
| beam current: | 5-20 μA |
|---|---|
| fast raster: | off |
| target: | 3% carbon |
| HMS/SHMS collimator: | PION , COLLIMATOR |
| HMS/SHMS trigger: | SCIN 3/4, SCIN 3/4 |
| HMS angle/momentum | |
| SHMS angle/momentum |
