Re: wfd formatting errors

[Tim Gorringe <gorringe@pa.uky.edu>]

Hi Peter,

I certainly agree the neutron counters need careful set-up
of their gains and understanding of their pulse shape
discrimination. Most valuable in our Triumf experiment was
initial running with pi- stops in hydrogen - using the 8.9
MeV, BR=0.4, pi- p -> g n neutrons to calibrate the system.
I'm assuming that doing this in the gas target is either definitely
not feasible or not definitely not  a priorty. Thus I think
we'll need  to resort to gamma sources (Na22, Cs137)  for energy
calibration and Am-Be for n/g discrimination.

Cheers, Tim.


Peter Kammel wrote:

>Dear Tim,
>
>As discussed with Peter, it is important to set the dynamic
>range (i.e. HV of the PM) so that it covers closely the 
>capture neutrons (i.e. ~ 4MeV Ee). Otherwise the PSD 
>discrimination is compromised, because the WFD have only
>8 bits.
>
>Regards
>
>Peter
>
>On Sat, 3 Dec 2005, Tim Gorringe wrote:
>
>  
>
>>Hi Rob and Peter,
>>I have the three DEMON neutron counters switched on at 1400V
>>with their outputs passed through a LeCroy linear fan-out. The rate
>>of >1Volt pulses is of order of 10's per sec. I'd proposal to try one -
>>in mulan we also had some pulses with larger than 1 volt
>>Cheers, Tim.
>>
>>Peter Kammel wrote:
>>
>>    
>>
>>>Dear Rob,
>>>
>>>Do we have your ok to record the neutron detectors 
>>>via a linear fan? If yes, we should do it during
>>>Tim's short visit.
>>>
>>>Thanks
>>>
>>>Peter
>>>
>>> 
>>>
>>>      
>>>
>
>Peter Kammel  /  pkammel@uiuc.edu
>Department of Physics, Loomis Laboratory
>University of Illinois at Urbana-Champaign
>1110 West Green Street, Urbana, IL 61801 
>Tel (217) 333-5424 / Fax (217) 333-1215   
>
>  
>