We are using in-house designed VME modules.
If you are using VME, our 8-channel beam current amplifiers (with built
in transient digitizer, 10s of kHz) and our 96-channel harp module may
be of interest to you.
Look at http://isacwserv.triumf.ca/edevel/EdevelFrameSet.html and
follow the link to VME modules.
I would have to check on the modalities of selling these modules off-site.
- rolf -
See
Heinrich du Toit wrote:
Hi guys
I'm looking for some information on how you solve this problem...
We need to measure currents.. from harps and slits and faraday cups.
All of this gives of currents that is important.
Some of the currents we measure with keithleys but it is way to
expensive to buy keithleys for harps as you will need 100's of them :)
We need to measure currents between nA and uA range for harps and slits.
For faraday cups this sometimes goes to 100+ uA but our main problem
is harps/slits.
I hope that we are not the first to have this problem, is there some
cost effective method to solve this problem? That can give descent
results.
The problem can basically be given as:
How do I measure 50+ current inputs (harp = 96, 4 per slit-set) across
a wide range (2nA fullscale = 50pA sensitive up to 100uA full scale)
still have resonable accuracy especially between the lines and have a
descent update rate and not 2 high noise levels.
(I guess noise can to some extend be solved with a software filter if
updates are high enough)
Thanks for your support :)
-Heinrich
--
+-------------------------------------------------------+
| Rolf Keitel, Ph.D., TRIUMF Tel: (604) 222-7453 |
| Manager Electronics and Controls Fax: (604) 222-7307 |
| Engineering Division |
| Vancouver, B.C., Canada |
+-------------------------------------------------------+
- References:
- current measurement - hardware Heinrich du Toit
- Navigate by Date:
- Prev:
RE: current measurement - hardware Joze Dedic
- Next:
JCA using problem 鲍春雷
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
<2007>
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
Re: current measurement - hardware Mark Davis
- Next:
RE: current measurement - hardware Joze Dedic
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
<2007>
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
|