High Voltage System outside Drawers
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Transcript of High Voltage System outside Drawers
High Voltage System outside Drawers
Tilecal upgrade meeting at Stockholm (3-5 June 2013)François Vazeille
on behalf of Roméo Bonnefoy, Christian Fayard, Marie-Lise Mercier, Eric Sahuc.
Summary of previous progresses· Present status· Tests and next steps
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Summary of previous progresses
· Several options reported since a long time HV regulation inside/outside Drawers
[Tilecal meetings: February 2008, November 2009, September 2012]
Þ Choice of the outside option 3: - Re-cycling of HV cards inside a special crate put in the electronics room. - Design of HV bus cards sharing the individual HV’s (with noise killers). - Use of multiconductor cables to supply the HV bus cards.
· Clermont-Ferrand proposition to develop an outside option, but ready to provide all the information on the present ATLAS inside option.
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New HV Bus boards (no active components)
12 channels.- A 4-layer printed circuit: External layers as shielding, Internal layers to distribute the HVs.- Noise killers everywhere.- New HV connectors (more robust), but 8 weeks delivery delay
New HV regulation crate: ¼ of the total space (4 Modules later)
HV
LV’s
Individual Hvout:SUBD25 connectors
CANBUS
Rear
Front
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Present status
HV Bus boardsready to equip 3 trains of Mini-Drawers
A cable tray will run3 different cable lengths
towards Drawers 2, 3 and 4(Fixation holes made here)
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Regulationcrate
HVSource Operational DCS
Various cable lengths
- 1m long.- 4 times 20 m long (175)- 100 m long, to reproduce ATLAS.
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Tests and next steps
· Clermont-Ferrand tests HV tests in progress, with a PMT Block lighted by a blue LED Noise measurements for different cable lengths. Results the next time.
· CERN tests - Mini-Drawer handling/connection tests in building 175 using Slider and Basket, in the same time as mechanics tests. - HV tests in building 175, once the Clermont-Fd tests will be fully efficient. - Equipment of a Demonstrator in Building 175.
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