Welcome to the LHCb Muon Shift Training page

This page contains the basic informations needed to be trained as muon shifter

• Main Muon web page
• Muon Software page

Useful documents

• Shifter manuals

Muon System Control

• Log on the ui01 machine (also other machines are good as well: you just need to see the G:\).
• Many users can use the project in parallel
• The muon project from the top: G:\online\ecs\NewShortcuts\MUON
  • click on : MUSIDES_UI_FSM (shortcut to PVSS project)
  • wait until all the hierarchy is loaded and the main panel appears
  • From this project you can control everything
• To start using the project: take the lock!
  • Exclude : just exclude the system for the sessions but does not prevent a new take action to take control
  • Exclude and lock out: I exclude the system and I'm not going to take it back later in the current session by a new 'overall' take action

In order to store/control data the HLT, Storage, Monitoring and TFC subsystem should be ok (taken and allocated!).

Basics (normal procedure)

• Allocate: This is the very first part of the job. At the end of the Allocate procedure the NOT READY state must be reached.
  • If there's an error: recover -> try to recover a single error. reset -> try to reset all the chambers
• Reset:
• Activity:
  • This parameter is used to choose the recipes
  • Allowed values: PHYSICS or COSMICS
  • Activity (and save) can be used to customize the current session.
• Configure:
  • You issue the configure command and then you cross your fingers. At the end you expect everything blue and 'READY' state.
  • After ready state is reached you can start a run or have fun in other ways.
• Choose the parameters in TFC control.
  • MEP : multi event pack (pack together several consecutive events)
  • To save the changes click on 'Apply display'
  • L0DU is shared with other subdetectors: better to manage it from the main panel. If needed coordinate with other subsystem experts.
  • The TFC control changes can be done in any moment. Just STOP the run, change the parameters and then RESTART the run.
• Start a run:
  • From a READY state: You issue a start, you wait for ACTIVE state and then you 'GO' !

Monitoring

When acquiring data it is possible to monitor the acquisition.

• Start putty
  • ssh plus, enable x11 forwarding in the SSH X11 menu (placing the name of the machine you're on)
  • Follow the instructions shown here for the linux approach
• Go to the 'Page editor' mode
• Specificare HIST_WRITER (do not log off from DB) to get the permissions to enable histo you want.
• Got to the DIM histogram browser panel and select the process (monaxx) you want. Then on mona click with the right button and add checked to the database.
• Then come back to the 'Online' mode.

Creating Recipes

Troubleshooting

• After issuing a configure command I got an ERROR:
  • Try a RECOVER command in the main MUON SYSTEM.
  • If recover does not do the job try to browse the tree until the end of the problem to see if there's anything known.
  • If the error persist but the subsystem is not needed you can exclude it and go on.
• To reset a tell1
  • select the Tell 1 from the Muon main panel going down the tree
  • open putty and log onto the tell1 (Ex. : mutellc02)
  • From the machine: sudo /sbin/service ccserv restart for 2 times. First time you are asked for a pwd. The you should reissue the command.

Contactpersons

• TMU stuff : L0 people.
• HLT stuff: Bruno de Paula.

-- AlessioSarti - 22 Jul 2008