Difference between revisions of "Beam Polariazation Measurement (How to)"
(→Polarization measurement with Hall A Moller polarimeter) |
(→Moller magnet settings and beam tuning) |
||
Line 246: | Line 246: | ||
<!-- '''1:''' SM 13.0um (old), '''2:''' SM 29.4um, '''3:''' Fe 14.3um, '''4:''' Fe 9.3um, '''5:''' SM 6.8um, '''Left.Lim:''' Al 16.6um | <!-- '''1:''' SM 13.0um (old), '''2:''' SM 29.4um, '''3:''' Fe 14.3um, '''4:''' Fe 9.3um, '''5:''' SM 6.8um, '''Left.Lim:''' Al 16.6um | ||
--> | --> | ||
− | '''1:''' | + | '''1:''' Empty, '''2:''' Fe 10.0um, '''3:''' Fe 4.0um, '''4:''' Fe 1.0um |
=Detector HV tuning= | =Detector HV tuning= |
Revision as of 11:44, 7 March 2019
Back to main Moller
Contents
- 1 Polarization measurement with Hall A Moller polarimeter
- 2 Check list before measurements
- 2.1 Helicity, BCM signals in Hall A Counting Room
- 2.2 Helicity, BCM, 100kHz signals in Hall A Moller electronics rack
- 2.3 Helmholtz coils power supply
- 2.4 Target motion
- 2.5 Start CODA Moller database (msqld)
- 2.6 CODA LED test run
- 2.7 Check Helicity signals and scalers data in CODA data file
- 2.8 ADC Pedestals check
- 3 Software to start
- 4 Epics screens
- 5 Moller magnet settings and beam tuning
- 6 Detector HV tuning
- 7 Thresholds tuning
- 8 Polarization measurements
- 9 Data analysis
- 10 Results presentation
- 11 Spin dance
- 12 Troubleshooting
Polarization measurement with Hall A Moller polarimeter
Please, read these useful documents
- Hall A Møller Polarimeter OSP 2016 (need to update)
- Hall A Moller Polarization Measurement Procedure
Check list before measurements
Helicity, BCM signals in Hall A Counting Room
Patch panel in Counting Room with cables going to the Hall A:
Connector# Signals (all NIM level) (width) 4 - BCM signal for Moller (1us) from VtoF unit (??) Dx10 14 - Helicity signal (33ms) ----_____--- 15 - QRT signal (33ms) ----_____---- 16 - MPS signal (200 us) ---__---- front with 1us ahead of front of Helicity signal
Helicity, BCM, 100kHz signals in Hall A Moller electronics rack
- NIM Module type of PS757 (Fan in/out) in NIM crate of FADC electronics rack
#input Signals width 1 Clock 100kHz (50ns) 4 Helicity (33ms) 7 MPS (200us)
- ADC V792 in FADC VME crate:
#CH 00 Helicity signal #CH 01 QRT signal GATE 1.5us after front of MPS signal, width=130ns
- Check APERTURE THRESHOLD with digital multimeter on NIM 16ch discriminator module type of PS708 in NIM crate before old DAQ rack.
APERTURE THRESHOLD = -300mV (readout with digital multimeter)
- Check calorimeter OFFSETs with digital multimeter on NIM modules type of PS748 in slot #1 and PS740 slot #2 NIM crate in old DAQ rack.
- Dec 1, 2015
PS748 (slot #1) Ch # OFFSET(mV) 0 +11. 1 +12. 2 +11. 3 +11. 4 +12. 5 +10. 6 +10. 7 +12.
PS740 (slot #2) Ch # OFFSET(mV) 0 +18 1 +22 2 +14 3 +15
- Nov 25, 2014
PS748 (slot #1) Ch # OFFSET(mV) 0 +18.5 1 +18.6 2 +20.4 3 +21.7 4 +19.5 5 +25.5 6 +19.3 7 +10.3
PS740 (slot #2) Ch # OFFSET(mV) 0 +21.5 1 +21.6 2 +22. 3 +21.5
Helmholtz coils power supply
Target motion
Start CODA Moller database (msqld)
Login to adaq1 (since January 2016 we have moved our old DAQ from adaql1 to adaq1) as moller and check if msqld daemon is running:
adaq1> ps -u moller | grep msqld
if output like that:
22600 ? 00:00:01 msqld
that means msqld is running.
If not, type to start it:
adaq1> run_daemon_db msqld &
CODA LED test run
Check Helicity signals and scalers data in CODA data file
In ~/paw/moller start paw.
To check helicity, QRT signals type in paw:
paw> exe run run=15623 Run=15624 is attached to lun=21 paw> nt/sca //lun21/1 nsca>0 50 1 ! itick itrig(1) itrig(6) itrig(8)
This is output for 30Hz helicity (pair):
+-------+-------------+-------------+-------------+-------------+ | Event | itick | itrig(1) | itrig(6) | itrig(8) | +-------+-------------+-------------+-------------+-------------+ | 2 | 11155369 | z'0' | z'1' | z'0' | | 5 | 11155373 | z'0' | z'0' | z'1' | | 8 | 11155377 | z'0' | z'0' | z'1' | | 11 | 11155381 | z'0' | z'1' | z'1' | | 14 | 11155385 | z'0' | z'0' | z'1' | | 17 | 11155389 | z'0' | z'1' | z'1' | | 20 | 11155393 | z'0' | z'1' | z'1' | | 23 | 11155397 | z'0' | z'0' | z'1' | | 26 | 11155401 | z'0' | z'0' | z'0' | | 29 | 11155405 | z'0' | z'1' | z'1' | | 32 | 11155409 | z'0' | z'1' | z'1' | | 35 | 11155413 | z'0' | z'0' | z'1' | | 38 | 11155417 | z'0' | z'1' | z'1' | | 41 | 11155421 | z'0' | z'0' | z'1' | | 44 | 11155425 | z'0' | z'0' | z'1' | | 47 | 11155429 | z'0' | z'1' | z'1' | | 50 | 11155433 | z'0' | z'1' | z'0' | +-------+-------------+-------------+-------------+-------------+
Where:
itick - VxWorks time ticks (set in ~/daq/coda2/crlppc/moller_onl.crl to 8.33mS) itrig(1) - ADC gate on input #1 of TIR board itrig(6) - Helicity signal on input #6 of TIR board itrig(8) - QRT signal on input #8 of TIR board
To check scalers data type in paw:
paw> nt/sca //lun21/1 nsca>0 50 1 ! itick isca(1) isca(2) isca(3) isca(4) isca(5) +-------+-------------+-------------+-------------+-------------+-------------+-------------+ | Event | itick | isca(1) | isca(2) | isca(3) | isca(4) | isca(5) | +-------+-------------+-------------+-------------+-------------+-------------+-------------+ | 2 | 11155369 | 9315 | 9315 | 9315 | 0 | 0 | | 5 | 11155373 | 9463 | 9463 | 9463 | 0 | 0 | | 8 | 11155377 | 9611 | 9611 | 9611 | 0 | 0 | | 11 | 11155381 | 9760 | 9760 | 9760 | 0 | 0 | | 14 | 11155385 | 9909 | 9909 | 9909 | 0 | 0 | | 17 | 11155389 | 10057 | 10057 | 10057 | 0 | 0 | | 20 | 11155393 | 10205 | 10205 | 10205 | 0 | 0 | | 23 | 11155397 | 10353 | 10353 | 10353 | 0 | 0 | | 26 | 11155401 | 10502 | 10502 | 10502 | 0 | 0 | | 29 | 11155405 | 10650 | 10650 | 10650 | 0 | 0 | | 32 | 11155409 | 10798 | 10798 | 10798 | 0 | 0 | | 35 | 11155413 | 10946 | 10946 | 10946 | 0 | 0 | | 38 | 11155417 | 11095 | 11095 | 11095 | 0 | 0 | | 41 | 11155421 | 11243 | 11243 | 11243 | 0 | 0 | | 44 | 11155425 | 11391 | 11391 | 11391 | 0 | 0 | | 47 | 11155429 | 11539 | 11539 | 11539 | 0 | 0 | | 50 | 11155433 | 11688 | 11688 | 11688 | 0 | 0 | +-------+-------------+-------------+-------------+-------------+-------------+-------------+
Where:
isca(1) - Left arm (LG and Ap) isca(2) - Right arm (LG and Ap) isca(3) - Coincidence Left and Right arms isca(4) - Accidentals Left and Right arms isca(5) - BCM isca(6) - PLU out 7; in LED setup - number of LED flashes isca(7) - isca(8) - isca(9) - isca(10) - (Helicity delayed)*Clock(100kHz) isca(11) - !MPS isca(12) - PLU out #6 (TimerGenarator * helicity window) isca(13) - isca(14) - isca(15) - Clock TimerGenerator 100kHz
ADC Pedestals check
- Set HV ON on moller detector. (Need link to HV ON)
- Select configuration "moller_puls" in old CODA, download it.
- In "mpc" programm load configuration "PULSER_SET" to detector electronics and start CODA run.
- Take 3000-5000 events and stop run.
- In ~/paw/moller start paw:
> paw paw> exec run run=15627 paw> exec lg_pedes run=15627 pulschk=1
- Copy output results into text file with name "pedes_#RunNumber.dat", where #RunNumber is CODA "pulser" run.
- Edit file "lg_spectra.kumac", replace:
... else ve/read pedes,pedcut pedes_14754.dat endif ...
with:
elseif [run]<#RunNumber then ve/read pedes,pedcut pedes_14754.dat else ve/read pedes,pedcut pedes_#RunNumber.dat endif ...
Software to start
- CODA
- old DAQ ( data in /adaq1/data1/raw ):
ssh moller@adaq1 adaq1> start_coda
- Detector settings and HV control GUI
ssh moller@adaql2 adaq2> cd Java/msettings/ adaq2> mpc
- FADC DAQ ( data in /data1/raw ) :
ssh moller@hamoller (open 3 terminals) hamoller> start_coda_fadc
- FADC settings:
hamoller> cd crl/FADC/ hamoller> gui_fadc_par
- FADC online monitor:
hamoller> cd fadc_online/mollmon/ hamoller> mollmon -n moller25 -h hamoller
- EPICS control
ssh adaq@adaq1 adaq1> monticello (OS Menu -> EDM -> Hall A -> HallA Moller polarimeter control)
OR
adaq1> jtabs (Beam Setup -> HallA-> Magnets-> Moller-> Combo)
Epics screens
Start JMenu (login to 'adaq1' as 'moller' and type):
jmenu
input password for user 'adaq'
Then select from JMenu:
- Helicity Control
JMenu->Beam Setup->Injector->Parity->Helicity Control
- Moller Combo (Magnets Q1-Q4, Dipolem Solenoid (sup.cond.) control, Target motion control, )
JMenu->Beam Setup->Hall A->Hall A Moller->Combo
- Target Motion Control
JMenu->Beam Setup->Hall A->Moller Measurements->Moller Target Control
- BPMs position
JMenu->Operations->Bpms->Hall A Absolute Spikes
or
JMenu->Operations->Bpms->Hall A Relative Spikes
Moller magnet settings and beam tuning
- Ask target operator to remove the main Hall A target
- Raster OFF
- Moller magnet settings: (Q1,Q2,Q3,Q4, Dipole-OFF)
1st Moller quadrupole magnet Q1 - MQO1H02 2nd Moller quadrupole magnet Q2 - MQM1H02 3rd Moller quadrupole magnet Q3 - MQO1H03 4th Moller quadrupole magnet Q4 - MQO1H03A Moller dipole magnet - MMA1H01
- Get magnet settings for energy (as example) e0=7.37GeV
paw> lcd mag_optim paw> exec sett_magp11 e0=7.37 Eb=7.37GeV . Q1 Q2 Q3 Q4 Dipole kG -4.2742 -1.85808 1.994 4.345 10.8837 kG*m -30791.3 -16358.5 14315.3 30839.5 1.78793E+06 A -197.853 -93.5748 97.3212 208.451 399.068
- Ask MCC operator for beam current 0.5uA
- Beam position tuning with magnet settings (Q1,Q2,Q3,Q4) on IPM1H01 BPM ~0.2mm (absolute X,Y)
- Turn Beam OFF
- Turn ON Moller Dipole
- Ask Beam current 0.5uA
- Beam position tuning with Dipole ON on IPM1H01 BPM ~0.2mm
- Set Moller target on beam
1: Empty, 2: Fe 10.0um, 3: Fe 4.0um, 4: Fe 1.0um
Detector HV tuning
- HV for Moller detector:
portserver: hatsv5:2003 slot #5: ch:(0-3) - Calorimeter Left (1-4); ch:(4-7) - Calorimeter Right (1-4) slot #6: ch:(0-3) - Aperture Left (1-4); ch:(4-7) - Aperture Right (1-4)
- HV prediction (printout predicted HV calorimeter values for energy e0):
paw> exec hvlg e0=7.3 set=0
- Tune detector HV
- Start CODA run
- Check signals peak position at ADC channel.
paw> exec run run=15625 paw> exec lg_spectra run=15625
- Change HV for calorimeter in order to align the Møller peak position at ADC channel 300 for each block.
- Repeat from #1
- FADC DAQ: check signals peak position on online monitor 'mollmon'
Thresholds tuning
Polarization measurements
- Start dbedit on adaq1, select "mollerpol_l" database and set in "beam_pol" configuration table in row "code" parameter "adcevents" from 9 to 2: " ... adcevents=2"
- Make at least two CODA runs in order to use both coil polarities.
Data analysis
- old DAQ: adaq1:~/paw/moller/
> paw paw> exec run run=15625 paw> exec lg_spectra run=15625 paw> exec time run=15625 paw> lcd mag_optim paw> exec anpow_set e0=7.37 (E0 - beam energy in GeV) paw> lcd .. paw> exec asym15 anpow=0.7735 gate=0.033 run=15625 (gate=0.033 for 30Hz helicity frequency and gate=0.0008 for 1kHz)
- FADC DAQ: hamoller:~/fadc_analysis/moller_fadc-15Nov2011/
> bash > source root-setup.sh > cd onlana > analyser analyser> replay_test(3023) analyser> .x do_analyse(3023)
The above steps have been tested and are up to data as of November 17th, 2018 - Bill H.
Results presentation
- Results of all runs from "asym11" stored in files: runs.tab, res.dat
- Do copy these files to paw/moller/meas:
> cp runs.tab meas/runs.tab.#RunBeg-#RunEnd > cp res.dat meas/res.dat.#RunBeg-#RunEnd
- To plot and average results, edit file: ~/paw/moller/asym_avt.kumac
- comment old beam polarization data and add new one, modify output of 'ps' file and titles with date then run it.
Spin dance
Troubleshooting
- VME crates reboot
- Software reboot if VME crate is running:
- old DAQ hallavme5:
> telnet hatsv5 2004 > reboot Ctrl and "]" telnet> quit
- FADC DAQ:
> telnet hatsv12 2005 > reboot Ctrl and "]" telnet> quit
Boot parameters of VME CPU (as on 26 Oct 2016):
VxWorks (for Motorola MVME6100-0163 - MPC 7457) version 5.5.1. Kernel: WIND version 2.6. Made on Feb 23 2009, 15:41:51.
boot device : geisc unit number : 0 processor number : 0 host name : adaq1 file name : /adaqfs/home/moller/vxworks/vx6100_v4.1big inet on ethernet (e) : 129.57.192.55:ffffff00 host inet (h) : 129.57.192.102 gateway inet (g) : 129.57.192.1 user (u) : moller flags (f) : 0x20 target name (tn) : bbspare1 startup script (s) : /adaqfs/home/moller/vxworks/fadcmoller.boot
Boot parameters of VME CPU (as on 26 Oct 2016):
VxWorks (for Motorola MVME2300 - MPC 604r) version 5.3.1. Kernel: WIND version 2.5. Made on Mar 25 1998, 08:54:04.
boot device : dc processor number : 0 host name : adaq1 file name : /adaqfs/home/moller/vxworks/vx2306_14 inet on ethernet (e) : 129.57.192.31:ffffff00 host inet (h) : 129.57.192.102 gateway inet (g) : 129.57.192.1 user (u) : moller flags (f) : 0x20 target name (tn) : hallavme5 startup script (s) : /adaqfs/home/moller/vxworks/hallavme5_c4.boot
- old DAQ hallavme5:
- Hardware reboot if crates not response:
- On adaq1 start firefox
old DAQ hallavme5:
Go to: http://hareboot26
(outlet #3)user: hlauser select in "ON" box Outlet #3, select in small box Outlet #3, select Action "Reboot Immediatly" and press "Next" button to activate menu. press "Apply" button to activate action.
Wait for few minutes while VME crate is rebooting.
- FADC DAQ crate:
Go to: http://hareboot26
(outlet #1)user: hlauser select in "ON" box Outlet #1, select in small box Outlet #1, select Action "Reboot Immediatly" and press "Next" button to activate menu. press "Apply" button to activate action.
Wait for few minutes while VME crate is rebooting.
- On adaq1 start firefox
old DAQ hallavme5:
- Moller target softIOC reboot
-
You can reboot it from jtabs. Here are the steps:
ssh hlal00 jtabs select Control System select Individual IOC and iocsofthamol select Reboot Reason first and then Reboot
Or you can call MCC to have operator reboot it for you.
- HV control
-
HV GUI is running on adaq1 computer.
To check measured voltages of detector go to directory and type
adaq1> cd ~/daq/coda2/scripts adaq1> get_hv hatsv5:2003
-
To disable or enable HV channels for Moller detector type:
adaq1> ch_ce.sh 0 (disable all channels) adaq1> ch_ce.sh 1 (enable all channels)
- Data analysis