GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » Alice » Alice TRD chamber construction » Need of a preamplifier
Re: Need of a preamplifier [message #730 is a reply to message #721] Mon, 09 August 2004 22:45 Go to previous messageGo to previous message
Sascha Freuen is currently offline  Sascha Freuen
Messages: 9
Registered: August 2004
Location: Heidelberg PI
occasional visitor
From: *dip.t-dialin.net
Conditioning of Chamber L2C0#3:
==================================

Approaching the following settings in steps of 50V AnodeVoltage, after each step waiting till the Anodecurrent goes down under 10 nA :
AnodeVoltage = 1600 V , DriftVoltage = - 1935 V

3 times in the first hours with this settings the trip-current of 5 uA was reached, although besides the Anodecurrent seemed to be on a constant lvl of ~ 5 nA

During a second measurement over night (during first night a current trip happend) we saw this strange? progression of the Anodecurrent :

http://img7.exs.cx/img7/6682/k1.png

The next night everything seemed to be pretty normal :

http://img7.exs.cx/img7/1230/k2.png

During one more test with DriftVoltage = -2100 V the Anodecurrent was constantly ~6 nA


I propose to implement a new forum-section "Alice TRD Chamber testing"

Regards

Sascha

[Updated on: Wed, 11 August 2004 00:45]

Report message to a moderator

 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Cathode Wire Quality
Next Topic: Not connected pads
Goto Forum:
  


Current Time: Tue Oct 04 11:37:32 CEST 2022

Total time taken to generate the page: 0.01095 seconds