D2n Run Plan 2020
From HallCWiki
Rough / High-level sketch of d2n kinematic settings
Reduced kinematics list to accommodate limited beam time (dropped 1/4 of kinematics)
--------- Running Conditions ----------
E_beam = 10.4 GeV/c I_beam = 30 uA P_beam = 0.80
--------- HMS ----------
E' theta x Q2 W
A -4.2 13.5 0.207 2.414 3.178 -- Currently here (will take positive pol. data here too)
B -4.2 16.4 0.305 3.554 2.993
C -4.0 20.0 0.418 5.018 2.806 -- Started here (only setting compatible with SOLID Cherenkov small-angle test); will return here after 1-pass
--------- SHMS ----------
E' theta x Q2 W
X -7.5 11.0 0.527 2.866 1.859 -- Started here, still here
Y -6.4 14.5 0.565 4.240 2.036
Z -5.6 18.0 0.633 5.701 2.046 -- Next setting after 1-pass running
Run / Shift Schedule
- We started taking on Swing on Aug 7 (took a few days for beam to stabilize)
- Beam is scheduled to turn off 8am, Sept 21 (roughly 6 weeks) [1]
- Hall C Shift Schedule
Data Collection Status
- Data collection status is best monitored using
d2n_status_tableon cdaq@cdaql1
- Data collection status is best monitored using
[cdaq@cdaql1 ~]$ go_analysis pro cdaq@cdaql1:~/polhe3/production/hallc_replay$ d2n_status_table
d2n Collected Data Table [click me to expand]
- Updated Tue 18 Aug 2020 02:59:13 PM EDT
Setting target P th pol n_runs IHWP IN OUT e- yield charge / goal status
Kin-A (hms) POL-HE3 -4.200 13.50 90 82 49.17% 50.83% 2.46e+08 5.91e+07 4.17 / 6.06 68.8%
Kin-A (hms) POL-HE3 -4.200 13.50 270 0 0.00 / 6.06 0.0%
Kin-A (hms) POL-HE3 -4.200 13.50 0 0 0.00 / 0.69 0.0%
Kin-A (hms) POL-HE3 -4.200 13.50 180 0 0.00 / 0.69 0.0%
Kin-A (hms) REF-N2 -4.200 13.50 N/A 6 0.00% 100.00% 1.14e+07 1.14e+08 0.10 / 0.22 45.3%
Kin-A (hms) REF-H2 -4.200 13.50 N/A 6 0.00% 100.00% 1.46e+07 6.85e+07 0.21 / 0.22 96.8%
Kin-A (hms) REF-HE3 -4.200 13.50 N/A 0 0.00 / 0.22 0.0%
Kin-A (hms) REF-VAC -4.200 13.50 N/A 2 0.00% 100.00% 3.04e+06 3.04e+07 0.10 / 0.22 45.5%
Kin-A (hms) C-OPTICS -4.200 13.50 N/A 10 0.00% 100.00% 1.68e+07 9.15e+07 0.18 / 0.08 228.8%
Kin-A (hms) EMPTY -4.200 13.50 N/A 4 0.00% 100.00% 3.49e+06 2.45e+07 0.14 / 0.08 177.8%
Kin-B (hms) POL-HE3 -4.200 16.40 90 0 0.00 / 6.13 0.0%
Kin-B (hms) POL-HE3 -4.200 16.40 270 0 0.00 / 6.13 0.0%
Kin-B (hms) POL-HE3 -4.200 16.40 0 0 0.00 / 0.61 0.0%
Kin-B (hms) POL-HE3 -4.200 16.40 180 0 0.00 / 0.61 0.0%
Kin-B (hms) REF-N2 -4.200 16.40 N/A 0 0.00 / 0.22 0.0%
Kin-B (hms) REF-H2 -4.200 16.40 N/A 0 0.00 / 0.22 0.0%
Kin-B (hms) REF-HE3 -4.200 16.40 N/A 0 0.00 / 0.22 0.0%
Kin-B (hms) REF-VAC -4.200 16.40 N/A 0 0.00 / 0.22 0.0%
Kin-B (hms) C-OPTICS -4.200 16.40 N/A 2 0.00% 100.00% 9.98e+05 8.42e+06 0.12 / 0.08 148.1%
Kin-B (hms) EMPTY -4.200 16.40 N/A 2 0.00% 100.00% 4.33e+05 3.37e+06 0.13 / 0.08 160.3%
Kin-C (hms) POL-HE3 -4.000 20.00 90 12 23.48% 76.52% 6.08e+06 8.80e+06 0.69 / 6.05 11.4%
Kin-C (hms) POL-HE3 -4.000 20.00 270 50 52.83% 47.17% 2.04e+07 1.01e+07 2.02 / 6.05 33.3%
Kin-C (hms) POL-HE3 -4.000 20.00 0 0 0.00 / 0.69 0.0%
Kin-C (hms) POL-HE3 -4.000 20.00 180 0 0.00 / 0.69 0.0%
Kin-C (hms) REF-N2 -4.000 20.00 N/A 10 0.00% 100.00% 6.65e+06 3.99e+07 0.17 / 0.22 75.8%
Kin-C (hms) REF-H2 -4.000 20.00 N/A 0 0.00 / 0.22 0.0%
Kin-C (hms) REF-HE3 -4.000 20.00 N/A 0 0.00 / 0.22 0.0%
Kin-C (hms) REF-VAC -4.000 20.00 N/A 0 0.00 / 0.22 0.0%
Kin-C (hms) C-OPTICS -4.000 20.00 N/A 8 0.00% 100.00% 7.49e+05 1.38e+06 0.54 / 0.50 108.6%
Kin-C (hms) EMPTY -4.000 20.00 N/A 8 0.00% 100.00% 1.65e+05 9.21e+05 0.18 / 0.50 35.9%
Setting target P th pol n_runs IHWP IN OUT e- yield charge / goal status
Kin-X (shms) POL-HE3 -7.500 11.00 90 94 45.52% 54.48% 4.95e+08 1.05e+08 4.71 / 6.06 77.7% Kin-X (shms) POL-HE3 -7.500 11.00 270 53 51.94% 48.06% 2.28e+08 1.13e+08 2.02 / 6.06 33.4% Kin-X (shms) POL-HE3 -7.500 11.00 0 0 0.00 / 0.69 0.0% Kin-X (shms) POL-HE3 -7.500 11.00 180 0 0.00 / 0.69 0.0% Kin-X (shms) REF-N2 -7.500 11.00 N/A 19 0.00% 100.00% 5.84e+07 2.20e+08 0.27 / 0.22 120.6% Kin-X (shms) REF-H2 -7.500 11.00 N/A 6 0.00% 100.00% 1.98e+07 9.76e+07 0.20 / 0.22 92.2% Kin-X (shms) REF-HE3 -7.500 11.00 N/A 0 0.00 / 0.22 0.0% Kin-X (shms) REF-VAC -7.500 11.00 N/A 2 0.00% 100.00% 4.84e+06 4.93e+07 0.10 / 0.22 44.6% Kin-X (shms) C-OPTICS -7.500 11.00 N/A 10 0.00% 100.00% 1.75e+07 9.00e+07 0.20 / 0.08 243.8% Kin-X (shms) EMPTY -7.500 11.00 N/A 10 0.00% 100.00% 1.15e+07 5.07e+07 0.23 / 0.08 284.5%
Kin-Y (shms) POL-HE3 -6.400 14.50 90 0 0.00 / 6.13 0.0% Kin-Y (shms) POL-HE3 -6.400 14.50 270 0 0.00 / 6.13 0.0% Kin-Y (shms) POL-HE3 -6.400 14.50 0 0 0.00 / 0.61 0.0% Kin-Y (shms) POL-HE3 -6.400 14.50 180 0 0.00 / 0.61 0.0% Kin-Y (shms) REF-N2 -6.400 14.50 N/A 0 0.00 / 0.22 0.0% Kin-Y (shms) REF-H2 -6.400 14.50 N/A 0 0.00 / 0.22 0.0% Kin-Y (shms) REF-HE3 -6.400 14.50 N/A 0 0.00 / 0.22 0.0% Kin-Y (shms) REF-VAC -6.400 14.50 N/A 0 0.00 / 0.22 0.0% Kin-Y (shms) C-OPTICS -6.400 14.50 N/A 2 0.00% 100.00% 1.21e+06 1.02e+07 0.12 / 0.08 147.9% Kin-Y (shms) EMPTY -6.400 14.50 N/A 2 0.00% 100.00% 7.35e+05 5.73e+06 0.13 / 0.08 160.4%
Kin-Z (shms) POL-HE3 -5.600 18.00 90 0 0.00 / 6.05 0.0% Kin-Z (shms) POL-HE3 -5.600 18.00 270 0 0.00 / 6.05 0.0% Kin-Z (shms) POL-HE3 -5.600 18.00 0 0 0.00 / 0.69 0.0% Kin-Z (shms) POL-HE3 -5.600 18.00 180 0 0.00 / 0.69 0.0% Kin-Z (shms) REF-N2 -5.600 18.00 N/A 0 0.00 / 0.22 0.0% Kin-Z (shms) REF-H2 -5.600 18.00 N/A 0 0.00 / 0.22 0.0% Kin-Z (shms) REF-HE3 -5.600 18.00 N/A 0 0.00 / 0.22 0.0% Kin-Z (shms) REF-VAC -5.600 18.00 N/A 0 0.00 / 0.22 0.0% Kin-Z (shms) C-OPTICS -5.600 18.00 N/A 7 0.00% 100.00% 7.37e+05 1.39e+06 0.53 / 0.50 105.7% Kin-Z (shms) EMPTY -5.600 18.00 N/A 2 0.00% 100.00% 1.48e+04 1.62e+05 0.09 / 0.50 18.2%
- The above table is also posted to the HCLog every shift with the subject "Recent SHMS and HMS run list".
- You can use the
Hall C Run List Summarieslink under the HCLog Useful Links sidebar on the right as a shortcut.
- The runtimes and estimated yields are based on Rate Estimate Updates (19 Mar 2020) by Wolfgang
- (NOTE: Ignore the primed kinematics in the file, they are not relevant anymore.)
Special Runs
BCM Calibration-- Complete https://logbooks.jlab.org/entry/3824242Bulls Eye Scan-- Done for A1n (do we want a repeat?)- Beam Energy Measurement
Notes for Near Term Running
This will be updated frequently
Positron Running (Charge Sym BG study)
- Simona showed a nice plot from the Hall C F2 running of their CSB correction at 21deg vs E'.
That indicates the e+:e- correction is indeed quite small (she'll send out the F2 data to the group) - That argues that all we need to measure are rates -- much simpler/faster.
- Mike Nycz provided some data from Marathon as well
- For rates only, it looks like it would be better to use the SHMS instead since its polarity can be reversed remotely
- So, the tentative plan is to flip the SHMS polarity (remotely) and take positive polarity data on Sunday; after we have completed the longitudinal production running. At that point we don't have to worry about impacting the pol. He3 polarization. - Best SHMS setting for this is probably 18 deg, 5.6 GeV/c for a direct match with Kin-Z? We could measure at lower p0 as well for better overlap with HMS Kin-C. - We'll get this into the run plan for the weekend.
Longitudinal Running
- That would place the longitudinal running for this kinematic pair (Kin-A, Kin-X) starting
next Thursday swing following the Moller.
- Once we have the needed longitudinal statistics (1--2 days), we will collect the remaining
reference cell data (including He3!) and perhaps do a beam energy calibration before moving\
to 1-pass on Monday, Aug 24.
Remaining Reference Cell running at current settings
Kin-A Kin-C Kin-X
- REF-Hydrogen 42% 0%* 114% (collected)
- REF-Nitrogen 97% 76%* 121% (collected)
- REF-Vacuum 46% --%* 45% (collected)
- REF-He3 --% --% --% (collected)
- make He3 the last ref-cell fill at 5-pass, so we can do the pressure
curve run on He3 at 1-pass
1-pass Running
- Pass change scheduled for 8am Monday, Aug 24 - See D2n_Run_Plan_2020#1-pass_Running below for details
Pol 3-He Cell Change
- We will be setting up Tommy for the next cell - Butterball has the wrong dimensions (out of spec) - Do this after the 1-pass running (Start Day shift, Thurs Aug 27) - Do Moller and Ref Cell running as needed at 1-pass while testing target and spinning back up
5-pass Production Procedure
- SHMS and HMS runs are independent, but are run in pairs that should reflect similar rates (when possible)
- Run time for each of the 3 kinematic pairs is roughly 125 PAC hours, ~10 calendar days/pair
- Minimize the number of NMR measurements to preserve target polarization
- This generally means minimizing target direction changes, since each change usually imposes an 'as-is' NMR, and then a post-rotation NMR.
- General considerations
- Flip IHWP every 4--8 hours (coordinate with Hall A) - Ensure Charge Asym Feedback is running/working (watch the stripcharts and coordinate with Hall A) - Take NMR meas. every ~5 hours - Schedule a Moller run roughly every week - Target spin rotations/tests should be done immediately prior to the Moller so target has time to spin back up
- Reference cell runs needed for all Kinematics (nominal 2--4 hours per kinematic)
- Reference cell Nitrogen [135 psig] (Insert when we need time to spin up Polarized Cell) - Reference cell Hydrogen [135 psig] (Insert when we need time to spin up Polarized Cell) - Reference cell Vacuum [0 Torr] (Insert when we need time to spin up Polarized Cell) - Reference cell He3 [135 psig] (NOTE: Make best use of He3 by running this last in first kinematic, then first in next kinematic!)
- Polarized 3He Target • Transverse (90, 270) • Total run time 8--10 days
- Flip target spin after 3--4 days - Run 3--4 more days with the opposite target spin
- Polarized 3He Target • Longitudinal (0, 180) • Total run time ~1--2 days
- Flip IHWP at 1/2 way into each run block (~4 hours) - ~11 hours @ 0deg - ~11 hours @ 180deg
1-pass Running
- Pass change to 1-pass: 8am Monday, August 24
- Pass change to 5-pass: 8am Thursday, August 27
- That is a nominal 64 hours (assuming 8 hours for pass change)
- A1n 1-pass running notes
https://hallcweb.jlab.org/wiki/index.php/1-pass_calibration_for_A1n_(Jan_2020) https://hallcweb.jlab.org/wiki/index.php/1-pass_calibration_for_A1n Elastic Run Summaries from A1n period: SHMS, HMS
- Verify the following well before 1-pass period
- Confirm SHMS + HMS 1-pass optics is good! - Ensure the 1-pass analysis scripts are ready (Scott, Chao); Chao reports that is ready to go now - Confirm the T2/T3 trigger (3/4+cher) is ready to go (Brad)
- Necessary Prep work during Hall Controlled Access (schedule with RadCon in advance)
- Install collimators (JP, RadCon) [2] - Check on EPR photo-diode status, likely replace it (RadCon) - Ensure fast raster is reconfigured correctly (Expert: Jones, Gunning) - "Have MCC click on the button on the Expert page for 1 coil (instead of 2 coils). Ensure "gbeam_pass1_jan2020.param" is used for analysis"
- Moller Measurement ASAP (also allows target to spin up after above prep work)
- Precision on this measurement does not have to be perfect -- mostly a sanity check to ensure there are no surprises
- Turn off SHMS/HMS bars following A1n example
https://logbooks.jlab.org/entry/3756736 https://logbooks.jlab.org/entry/3760238 Other paddle study links [3], [4]
Run Types for 1-pass
- Pressure curves (~ 6 hours)
- Record ref cell pressure before and after each run! - He3 : 8, 4, 2, 1, 0.5 atm (20 min/run) -- 2 hours + overhead - Nitrogen : 8, 4, 2, 1, 0.5 atm (20 min/run) -- 2 hours + overhead
- Hydrogen elastic [10 atm] (1 hour)
- Reference Cell vacuum (2 hours)
- Pol He3 Delta Transverse ( 4--8 hours )
- Pol He3 Elastic and QE longitudinal Asyms ( 4--8 hours )
- Pol He3 Elastic group has run simulations and recommend that we start
with the SHMS at 11deg (instead of 8.5deg).
- That shows an equal or better FoM, and we are less exposed to the
high-rate backgrounds, and will /not/ require extra staff support and time
to rotate SHMS to that angle.
- Collect our baseline Pol He3 Elastic asym at 11 deg, then continue with
the Pol He3 Elastic group's run plan (stepping the SHMS out in angle)
until we run out of beam time.
- HMS will remain parked at around 18.5 degrees
