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Rich Operations

With these pages we hope to provide helpful information on operating the RICH detectors during commissioning and data-taking. However, much of the information contained here is also relevant to the operation of the RICH components in the SSB labs and elsewhere.

Other sources of information:

Yellow pages

IP8 Control room (RICH/Calo/Muon) 77862
IP8 Control room (VeLo/ST/OT) 77867
IP8 Control room 77869
IP8 Control room 77874
IP8 RICH Labo 77870
IP8 Counting Room D3 77889
SSB1 lab. 74071
RICH readout on call 163837
DAQ on call 160703
TFC (ODIN) 163730
Paolo Guglielmini (Cooling) 163343
Olav 163342
Alessandro (mobile) +39 3484963256
Antonis (mobile) +41 762079538
RICH operations mailing list
DAQ support list
Control room printer 2885-R008-HP

Information for shifts

Some information intended for non-experts who need to operate the RICH detectors can be found here.

Power and cooling

ALERT! DSS is operational in the counting rooms at IP8 so most equipment there can be left on. However it is advisable to switch off equipment when not in use for extended periods (e.g. at weekends perhaps). On detector electronics should only be switched on with the agreement of the relevant experts.

Without cooling in the RICH2 on-detector electronics volume no more than one or two columns should be powered. With the cooling working all columns may be powered simultaneously. Pay attention to the temperature of the on-detector LV regulators and the environmental temperature.

The first time you need to do a full power up or power down read the information here. What follows below is a quick summary to remind you of the sequence and assumes you already know where everything is located.

Starting up

  • LV: When starting up, the racks and crates in D3 are powered first and only then are the Maraton power supplies in the bunker powered on. The power outputs are then enabled from the PVSS control interface (first the Maraton outputs then the LV regulators).
  • Si: In D3, with the isolation switches in the "Disabled" position, the Caen supply may be powered. First switch on at the rear, then turn the key on the front to "Local". Now use the isolation switches to enable any of the channels that you want to use. The Si bias may now be controlled from PVSS.
  • L1: Switch on the power supply at the rear of crate, then switch on the crate using the fan-tray switch (or remote control).

Shutting down

  • LV: When shutting down, first disable all the outputs via PVSS (LV regulators then Maratons) then power down the Maratons and finally power down the crates and racks in D3.
  • Si: First disable the Si bias from PVSS. In D3, isolate all channels then switch the key on the Caen supply to "Off" and power off at the rear.
  • L1: Switch off the crate using the fan-tray switch (or remote control) then switch off the power supply at the rear.

TIP Note that many crates have more than one switch. Often there is a switch on the power supply which isolates the mains supply and also an on/standby switch. For maximum protection against damage due to power cuts, the mains isolation switch should be used.

Computing environment at IP8

Access to the IP8 computing infrastructure is only via the gateways ( lbgw for Linux, lbts for Windows). Direct connection to online systems from outside the IP8 network is blocked. Note that the LHCb gateways are only visible from inside the CERN network/firewall: to connect from outside it one must log onto the CERN network before logging into the LHCb network.

Users have personal logins on the LHCb network. Request one from The login and all computing infrastructure is common across both linux (including CCPCs) and windows systems.

Note that from inside the LHCb network the external world is not, in general, accessible as well: only the gateways are connected to the CERN network.

There is an area set aside for common RICH software. The same area is visible from Linux and Windows at /group/rich/ and G:\rich respectively.

This area is currently organised as follows (alphabetically sorted):

  • /group/rich/HV/ RICH HV software (CCPC)
  • /group/rich/oper/ RICH ECS operation tools (shortcuts to operation programs)
  • /group/rich/pvss/ RICH PVSS components (strictly reserved for production projects only)
  • /group/rich/pvss/shared RICH PVSS common most-used components
  • /group/rich/sw/ other software
  • /group/rich/sw/cmtuser/ CMT managed software (user release area)
  • /group/rich/Utils/ folder containing miscellaneous programs used for RICH ECS operation

There is a group-wide login profile for the linux systems at /group/rich/scripts/

We are currently experimenting with ACLs on the filesystem which provide better control over file access than standard UNIX permissions. A plus character is appended to the directory access mode for directories with ACLs. Bear this in mind if you are having difficulties with file permissions. To view or manipulate ACLs from Linux, use the commands getfacl and setfacl.

TIP Please, if you create directories in /group/rich, make sure that the ACLs and file permissions are correctly applied. To help you, there is an alias doperm that recursively applies the correct ACL to all files owned by you starting at /group/rich.

ECS (Experiment Control System)

See here for information about the RICH ECS infrastructure.


HPD operational info. (Anode bias, HV)

Attached to this page is an Excel spreadsheet containing the HPD IDs in various numbering schemes.

The assignment of HV channels to RICH2 columns is can be found here.


For information regarding readout, monitoring and data handling for the RICH, see here.


Light Leak Detector (BLAC)

  • blac.pdf: User Manual for the Light Leak Detector (BLAC)

  • blac.pdf: User Manual for the Light Leak Detector (BLAC)

Run Conditions eLogbook Template

Topic attachments
I Attachment History Action Size Date Who Comment
Microsoft Word filedoc RICH-HV_UserManual.doc r2 r1 manage 6550.5 K 2007-11-23 - 10:15 UnknownUser RICH HV User Manual V 8.4
Microsoft Excel Spreadsheetxls RICHID.xls r2 r1 manage 65.5 K 2007-07-03 - 18:05 UnknownUser Spreadsheet containing HPD IDs etc.
PDFpdf blac.pdf r2 r1 manage 81.7 K 2007-09-06 - 21:32 UnknownUser User Manual for the Light Leak Detector (BLAC)
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Topic revision: r64 - 2007-11-23 - unknown
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