Re: UCN kicker signal

[Kevin Lynch <krlynch@bu.edu>]

David W Hertzog wrote:
> 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
> 
>  

We definitely need a signal, and we need it to be delivered reliably. 
But we only need to incorporate it into the data stream, and MuLan at 
least doesn't need prior warning that it's about to happen (to us, this 
is no different than the beam crashing  :-).  We certainly don't need to 
modify the acquisition to deal with the issue, beyond incorporating the 
signal.  This also provides a perfect, "built in", reconstructible, 
background free time window!  (The _reconstructible_ part is important) 
  Personally, I love this development.

So for us, we don't need (or even necessarily want) a prior warning 
signal ... but we do need a "the beam is being kicked away now" signal 
that comes when (and only when!) the beam is being kicked.  Anything 
less is unfortunate but not fatal, and anything more is gravy.

I can't comment on whether this does or does not affect MuCap.

> 
> -----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
> 
>  
> 
> 


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