Latest revision as of 17:30, 17 November 2014

Back to Beam Polariazation Measurement (How to)

Check list before measurements

Helicity, BCM signals in Hall A Counting room

Helicity, BCM, 100kHz signals in Hall A Moller electronics rack

Helmholz coils power supply

Target motion

Start CODA Moller database (msqld)

Login to adaql1 as moller and check if msqld daemon is running:

 adaql1> ps -u moller | grep msqld

if output like that:

 22600 ?        00:00:01 msqld

that means msqld is running.
If not, to start it type:

 adaql1> run_daemon_db msqld &

CODA LED test run

Check Helicity signals and scalers data in CODA data file

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 //lun24/1 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@adaql1  
 adaql1> start_coda

FADC DAQ ( data in /data1/raw ) :

 ssh moller@hamoller (open 3 terminals)
 hamoller> start_coda_brad

FADC settings:

 hamoller> cd crl/FADC/
 hamoller> gui_fadc_par

FADC online monitor:

 hamoller> cd fadc_online/mollmon/
 hamoller> mollmon -n moller25 -h hamoller

Detector settings and HV control GUI

 ssh moller@adaql2
 adaql2> cd Java/msettings/
 adaql2> mpc

EPICS control

 ssh adaq@adaql1  (or adaq1)
 adaql1> monticello (OS Menu -> EDM -> Hall A -> HallA Moller polarimeter control)

OR

 adaql1> jtabs (Beam Setup -> HallA-> Magnets-> Moller-> Combo)

Moller magnet settings and beam tuning

Ask target operator to remove the main 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_magp12 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 target on beam

 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

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)

Start CODA run
Tune detector HV
Check signals peak position at ADC channel.

 paw> exec run run=15625
 paw> exec lg_spectra run=15625

FADC DAQ: check signals peak position on online monitor 'mollmon'
Change HV for calorimeter in order to align the Møller peak position at ADC channel 300 for each block.
Repeat from #1

Thresholds tuning

Polarization measurements

Start dbedit on adaql1, 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: adaql1:~/paw/moller/

  > paw
  paw> exec run run=15625
  paw> exec lg_spectra run=15625
  paw> exec time run=15625
  paw> exec asym11 run=15625

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)

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 hatcv5 2004
  	  > reboot
	  Ctrl and "]"
	  telnet> quit

FADC DAQ:

	  > telnet hatsv12 2005
  	  > rebootrebooting VME crate
	  Ctrl and "]"
	  telnet> quit

Hardware reboot if crates not response:

On adaql2 start firefox old DAQ hallavme5:
Go to: http://hareboot6
(outlet #8)

          user: hlauser
	  select "Device Manager" tab,
	  select "Control" from left menu,
	  select in small box Outlet #8,
	  select Action "Reboot Immediatly " and
	  press "Next" 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.