RE: AW: UCN kicker signal

["David W Hertzog" <hertzog@uiuc.edu>]

Robert,
	You had one other question ... about the power supplies.  From
this distance it is hard to affect actions at PSI.  We are strongly in
favor, of course, of some sorts of stable supplies.  We had repeated
troubles with power supply drifts.  Very importantly for MuLan, in our
upcoming run we will give up on the in situ beam measurement wire
chamber during production runs.  We will have the chamber, but we will
only be able to check the beam spot periodically (every 4 h or so).
That means we will blindly count on the stability of the beam (yes, we
will monitor closely the power supplies online, but that's not quite
good enough).
	So, we are interested in any developments there.

Dave

-----Original Message-----
From: Peter Kammel [mailto:kammel@npl.uiuc.edu] 
Sent: Thursday, February 23, 2006 5:35 PM
To: Robert Scheuermann
Cc: David Hertzog; 'Tim Gorringe'; 'Carey, Rob'; 'David Webber'; 'Kevin
Lynch'; Fred Gray
Subject: Re: AW: UCN kicker signal

Dear Robert,

Thanks anyway for warning us. MuCap can deal with this issue in a
similar
manner as Mulan, I believe.

Best regards

Peter


On Wed, 22 Feb 2006, Robert Scheuermann wrote:

> Dave,
>
> Claude and Urs Rohrer told me later this day that kicker operation
isn't an
> issue this year.
>
> Nevertheless, I want to be prepared for eventual (and probably not
> announced) tests
>
> - any thoughts on low-current power supplies for piE3 ???
>
> robert
>
>
> -----------------------------------------------------
> Dr. Robert Scheuermann
> Laboratory for Muon Spin Spectroscopy
> Paul Scherrer Institut
> CH-5232 Villigen PSI
> Phone: +41 (0)56 310 3465
>
>
> -----Ursprüngliche Nachricht-----
> Von: David W Hertzog [mailto:hertzog@uiuc.edu]
> Gesendet: Mittwoch, 22. Februar 2006 18:26
> An: Scheuermann Robert; 'Peter Kammel'
> Cc: 'Tim Gorringe'; Carey, Rob; 'David Webber'; 'Kevin Lynch'
> Betreff: RE: UCN kicker signal
>
> Robert,
>
>            Thanks for this important warning.  We will probably want
to
> do something similar regarding a pause in the data taking.  A signal
of
> some sorts is important.  We will need to talk it over here to see
what
> suits us best.
>
>            Dave
>
>
>
> -----Original Message-----
> From: Scheuermann Robert [mailto:robert.scheuermann@psi.ch]
> Sent: Wednesday, February 22, 2006 4:05 AM
> To: 'Peter Kammel'; 'David W. Hertzog'
> Cc: Petitjean Claude; Deiters Konrad; Herlach Dierk
> Subject: UCN kicker signal
>
>
>
> Hi,
>
>
>
> what I have learned now is that UCN will run with 1% duty cycle using
> the full beam kicked ecery 6-8 min. for about 7 seconds.
>
> This will seriously disturb our ALC experiments.
>
> I will ask for the delivery of an 'kicker announcement signal' 10
> seconds before kicking in order to stop our DAQ and start a WAIT gate.
>
>
>
> Are there any (similar or additional) requirements from MuCAP or
MuLAN?
>
>
>
> regards
>
> robert
>
>
>
> ---------------------------------------------------------
>
> Dr. Robert Scheuermann
>
> Laboratory for Muon Spin Spectroscopy
>
> Paul Scherrer Institut
>
> CH-5232 Villigen PSI
>
> Phone: +41 (0)56 310 3465
>
>
>
>
>