Instruction/ maintenance manual of the product SR35 Midas Consoles
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MIDAS experiment „alc“ USER MANUAL SR35, 05.07.2006 Data acquisition is running on psw407 (DELL Power Edge 2600). AFS users can logon to pc5145, the local user account is l_musr_alc . Data files are stored locally on psw407 in /home/l_musr_alc/exp/alc and automatically copied to /afs/psi.
start web browser: http://psw407:8080 (PSI only!): Status page (the following screenshots are taken from pc4244…) DO NOT USE ‘Konqueror’ !!!! (only IE, Mozilla, or Firefox).
Start a run for autorun sequence: set autorun_active = 1 (if 0: only single run) there are no ‘scans’ anymore!.
Stop a run Do not interfere the stop ping proced ure – wait until the pages refreshes and shows sta tus ‘stopped’..
Set Magnet change Demand value read Hall probe read NMR probe - field >= 0.0 * - probe is locked * - readout unit is Tesla * - sum of returned errors (returned value < 0.0) * status unit * -1.0 BUS DRIVER I/O TIMEOUT I * -2.0 BUS DRIVER ERROR B * -4.
Set Temperature LTC21: Input: read values Output : set value LTC21_Analog_Set_Point (K).
Set Flow Demand = 3000 for T = 0 – 100 ° C, set Demand = 10000 for cooling down, base temp. ???.
History.
ODB: DO NOT TOUCH! – discuss with Instrument Scientist first Start frontends from term inal by running the command alc_start_midas Shutdown all frontends: alc_mcleanup [l_musr_alc@pc4244 alc]$ alc_mcleanup Midas cleanup procedure for experiment ALC.
mozilla-bin: no process killed killing opera... opera: no process killed Cleaning up shared memory segments for user l_musr_alc ... Cleaning up semaphores for user l_musr_alc .
Separator : vncviewer sepii:0 , pw: exhalle - if only black screen appears use rdesktop sepii , user: halle, pw: exhalle under winXP: Remote Desktop Connec tion (All Programs – Accessories – Communications) for HV = 150 kV: SEP = 746 The beamline setting is nam ed ALC2005_1st_period.
Data written as ASCII file : alc_05_NNNN.dat (run number NNNN) format: 19 header lines followed by data, lines containing 48 coloumns each !File: /home/l_musr_alc/exp/alc/alc_05_0270.
Appendix: Some ODB entries Ip_min is the minimum required beam current on Target E in mA. Measurement is paused when the current is lower. rate_min is the minimum required positron rate in the sum of the backward counters (this makes sure that the run is automatically paused when the beam blocker is closed).
Ip_channel is the channel number (starting at 0, in the above example this is the third channel) of the proton beam current signal, 100 kHz correspond to 1 mA. preset channels is the bitmask for the scaler cha nnels used f or the preset counting register in hex form.
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