HVM group could be used to switch on and off the LV and HV for the MUST2 crate.
The command could be lauched from the analysis environment: start a terminal and type:
> lpcgrit
This will connect to lpcgrit and source the correct environment.
Be careful: HV on mugast should not be on when the BT are off, this could damaged the PAC:
- Power up sequence : switch on BT first, then HV
- Power down sequence :Switch off HV first, then BT.
To switch on group use:
> hvm_group <group name> <on|off>
The following group exist:
- BT-MGA -> Low voltage for GRIT trapezoid and annular detector
- BT-MGB -> Low voltage for GRIT trapezoid
- BT-MUST -> Low voltage for MUST2 and 90 deg
- HV-MG -> GRIT Trap and Annular HV
- HV-MUST -> MUST2 Si and CsI HV
The programme return only once the voltage finished ramping up, so be patient. Once the voltage are set, it will print-out the relevant channel. If a channel trip, the programm print out the status of all the channel.
NB: over voltage on +5V channel is "normal" and ignored as an error by the program
To check the status of the voltage crate use the hvm_print command:
to print VAMOS and MUST2:
> hvm_print
to print MUST2:
> hvm_print MUST2
to print VAMOS:
> hvm_print VAMOS
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