High Voltage Systems for triple GEM detectors

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Last Updated: Wednesday, 12 February 2014 09:56
The HVGEM is a new device designed and realized in Frascati National Laboratory of INFN specifically for the High Voltage power supply of triple GEM detectors.
All the detectors for beam diagnostic described in this web site has been supplied with this new device.
module_hvgem  



The module needs a 15 V input and can be controlled by CANBUS connection.

The main characteriastics of this power supply was presented for the first time at X Pisa Meeting on Advanced Detectors :

G. Corradi, F. Murtas and D.Tagnani,
A novel High Voltage System for a triple GEM detector.
Nuclear Inst. and Methods in Physics Research, A (NIMA46 128 )

hvsys   On September 2007 a new HV System has been built for the 24 LHCb triple GEM chambers of M1R1 (see the picture on the left).
The crate is actually installed at CERN : it contains 24 HVGEM modules and 24 nanoammeters.
  A new control interface has been written in PVSS by Matteo Mara to set the GEM voltages and chamber fields. All the values are also checked every seconds and the program generate alarms in case of faults.

HVGEM 4 Modules System   On November 2008, a new system with only 4 modules (see the figure on the left) has been built for the Dafne Upgrade Luminometer.
This system is now working at UA9 experiment, supplying two triple GEM backgroud monitors at SPS (CERN).
console HVGEM   A Labview program has been developed to set the GEM voltages and the fields for the electron drifts.
The system is able to readout the voltages every seconds and drawn the values as a function of the time.
The Online console is shown in the figure on the left.
     
     
     
 
 

September 2010

We developed a new device for triple GEM power supply.
Compared with the previous version, each channel now has a high sensitivity current meter able to detect the GEM discharge.
These are the main characteristics :

  • - Standard NIM two units.
  • - USB & CAN-OPEN protocol communication interface.
  • - 7 independent channels full isolation at 5kV vs GND:
  •   + 6 channels  from  0 to   700V       max current 150µA
  •   + 1 channel    from  0 to 1400V       max current 100µA
  • - Current protection programmable for all channels (single value).
  • - 7 current readouts for each  channel :
  •    + low range :   from 10nA to 6µA
  •    + high range:   from 100nA to 40µA
   

HVGEM designed by G.Corradi (Laboratori Nazionali di Frascati INFN )
For any other  detailed information please contact : This email address is being protected from spambots. You need JavaScript enabled to view it.