Installation - main - Midas Howto

Software

Stopping and Restarting Midas clients
- Do not restart vme_fe, nemu_analyzer and mlogger, if a run is active!!!
- Use the Programs button on the Midas status web page on http://lem00/.
- If the shut down of a Midas client fails, you may try it once more. If this still does not work you have to kill the client manually, followed by an ODB cleanup:
  [nemu@lem00]$ killall -9 <client_name>
  [nemu@lem00]$ odbedit -e nemu -c "cleanup"
- use the Programs button on http://lem00 to restart the client
Shutdown or Recovery of Midas
- Stop run, if run active before shutting down Midas!!!
- If stop run does not work from Web browser, try
  [nemu@lem00]$ odbedit -e nemu -c "stop"
- If this fails, bad luck. Shutdown Midas with
  [nemu@lem00]$ nemu_mcleanup
- if shutdown was succesful without ODB corruption the system can be re-started as described above
- if ODB is corrupted, goto Recovery of Midas.
Run control on pc12438, pc12439
- use Firefox as web browser, control experiment through http://lem00/?exp=nemu.
- enter in a terminal/console beamline to start muE4 beam line control
- enter in a terminal/console hvEdit -e nemu -h lem00 to start HV control,
  or use the desktop icon
- other GUI's similarly.
How to change event definitions
- goto http://lem00/Equipment/Trigger/Settings?exp=nemu
- Do not change the settings (unless you know what you do) for T0_Offset TDC_Disable_AtStartup TOF_BC_Window TOF_BC_PileUp_Window
- goto http://lem00/Equipment/Trigger/Settings/Events?exp=nemu subdirectory to enable/disable different Event types:
  - Event0: BC-MCP1-MCP1_e+
  - Event1: BC-TD-MCP2-LE_e+
  - Event2: BC-TD-LE_e+
- for LE-muSR, disable Event0 and Event1, enable Event2
- To change settings for Event1, for example, goto http://lem00/Equipment/Trigger/Settings/Event_1_Settings?exp=nemu
  - you have the choice to enable/disable TD, MCP2, BC or e+.
  - you have the choice to set TD or MCP2 as "master" detector, i.e. times are measured with respect to the "master"
  - you may change the data window (66560 TDC channels correspont to 13musec) and the TD-MCP2 TOF window (TOF_M2_Window). TOF_M2_Pileup_Window is not yet implemented in the vme frontend
  - don't change master_delay and positron_delay unless you know what you do
Vme statistics
- goto http://lem00/Equipment/Trigger/Vme_Statistics?exp=nemu to get TDC channel counts and the "clean" (no pre-pileup) and "good" (no pre- and post-pileup) rates.
Online analysis on pc12438, pc12439
- Login as nemu on either pc12438 or pc12439.
- /mnt/home/nemu and /mnt/data/nemu will be automatically mounted.
  They point to
  lem00:/home/nemu and lem00:/data/nemu.
  This makes data on lem00 available on pc12438, pc12439.
- enter any2many for file conversion, if necessary (musrfit does not need file conversion)
- run musrfit as usual, input files on /mnt/home/nemu/analysis/YYYY
- use roody to inspect the online root histograms directly

Hardware

VME system:
- 2 VME crates
- CAEN TDC 1190B, 64 channels, 195.3125 ps (1/160MHz/32) LSB
- 2 SIS3820 scaler, 32 channels each
- 5 PSI CFD950, 8 channels each, CFD programmable through mscb
- 5 PSI SP950, 8 channels each, splitter with one input and two outputs per channel
- SIS3100/1100 VME-PCI interface with optical link
VME addresses
- TDC 1190B: 0xEE000000
- 1st SIS 3820: 0x38000000
- 2nd SIS 3820: 0x39000000
- CFD950:
  - 0xC2000000 (the rightmost module, ch 0-7)
  - 0xC2010000 (ch 8-15)
  - 0xC2020000 (ch 16-23)
  - 0xC2030000 (ch 24-31)
  - 0xC2040000 (ch 32-39) in the 2nd VME crate)
  - see http://lem00:8000/DetectorElectronics/13 for programming CFD using MSCB
RHEL 7 lem00 (IP XXX.XXX.140.28) as backend (pc8582 without RAID as backup system)
RHEL pc12438, pc12439 for run control, online analysis
psts03/05 terminal server to connect RS232 devices to slow control system
mscb006 submaster to connect SCS2001M slow control system
mscb008 submaster, HVR400
mscb009 submaster, HV-APD
mscb023 submaster, FUG-SpinRot
mscb034 submaster, FUG
lemplug on http://lem00
- LS_Sample
- LS_Mod_LS336
- NN3
- HV_FUG
- HV_SpinRot
- MSCB009
- Laser
- PSTS03
- ACP28
- SCS2001M
- K2400
- APR260
- NN13
- MSCB006
- MSCB008
- PSTS05
hipa-mue4, separate beamline control PC in LEM counting room
mpc1231, the separator Sep61 control PC
XXX.XXX.140.141 PSTS03
XXX.XXX.140.19 PSTS05
XXX.XXX.140.18 lemplug
XXX.XXX.140.44 lemplug2
XXX.XXX.140.39 LEM vacuum system control, port 2000
XXX.XXX.140.45 Sep61 vacuum system control, port 2000
XXX.XXX.140.46 PS64 vauum system control, port 2000
XXX.XXX.140.47 lem-lm510 LHe level meter

Installation - main - Midas Howto