Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  <20162017  2018  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  <20162017  2018 
<== Date ==> <== Thread ==>

Subject: Operational experience for Keithley 6485/6487
From: "Sapozhnikov, Leonid" <leosap@slac.stanford.edu>
To: "rivers@cars.uchicago.edu" <rivers@cars.uchicago.edu>, "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>, "paramveerjain89@gmail.com" <paramveerjain89@gmail.com>, "rivers@cars.uchicago.edu" <rivers@cars.uchicago.edu>, "marcio.donadio@lnls.br" <marcio.donadio@lnls.br>, "mooney@aps.anl.gov" <mooney@aps.anl.gov>, "ralph.lange@gmx.de" <ralph.lange@gmx.de>, "Peter.Mueller@ptb.de" <Peter.Mueller@ptb.de>
Date: Fri, 2 Dec 2016 18:35:30 +0000
Dear Colleague,

I am working at SLAC for LSLS-II experiment and I looking for your input for experience in usage of Keithley 6485/6487 pico-Ammeter.
I found your references at 
http://www.aps.anl.gov/epics/tech-talk/search.php

Let, me know if I overstepping your privacy by sending this email.

I have the following questions:
1. I am planning to use it for beam average current using Faraday Cup detector for 20-300pC charge. There are competing scenario when I need to operate at high (1MHz rate) and low beam rate (100Hz or lower).
My first question is anybody used device for similar condition and measured current accurately with pulsing input using internal filtering of device?
2. There are options to have external LPF, however it is not simple task due to leakage of component used, plus additional capacitance introduce additional noise for measurements. So, any suggestion if you have any.
3. I am trying to simulate beam pulses using of the shelf pulse generator, however there some imperfections in pulse generator response so it is hard to characterize system behavior without   perfection of real beam source. Any suggestions on how to test it without beam.
4. Any practical setting you are recommending for improvement average current measurement.

Regards, Leonid Sapozhnikov
   


Navigate by Date:
Prev: Re: SNL sequencer apparently losing connection to underlying network Pearson, Matthew R.
Next: Running IOC without network connection Miceli, Antonino
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  <20162017  2018 
Navigate by Thread:
Prev: Re: Capturing data from string which is sent by device Eric Norum
Next: Running IOC without network connection Miceli, Antonino
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  <20162017  2018 
ANJ, 05 Dec 2016 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·