[PEPPo] Urgent request for information

[Jean-Sebastien Real]

Dear Joe,

On my side I will be available anytime for the experiment.
I think that we should push to have option a) or c). As you said we are 
a small collaboration and we can not lost expertise on what ever side of
the experiment (I'm thinking about Erica, and may be other students). 
Option b), due to smaller number of people, will be challenging
concerning commissioning/staffing the experiment and we may spend more 
time to reach our goal.
Having a successful experiment with 14 days in may is (almost) obvious, 
having a successful experiment with 14 days in fall is feasible but very 
hard.

Between a) and c), I miss information to give my feeling. Are we 
expecting some beam time (during MD) to commission the beam line and 
possibly
have some electrons in the polarimeter (at least for few minutes)?
If yes option a) is better, if no we need option c) with at least 9 days 
in may to make everything working,
polarisation measurement on electron and few (2 or 3) positron measurements.
Then Fall run for 5 days will only be to increase statistic and to do 
remaining positron measurements.

Best regards,

Jean-sebastien.

On 12/14/11 23:34 , Joe Grames wrote:
> Dear PEPPo Collaborator,
>
> Scheduling the PEPPo experiment during the 12MSD is a hot topic, in 
> both the good and bad sense.  It is a positive thing in the sense that 
> the hard work to install PEPPo and successfully defend the PAC 
> proposal has put a legitimate foot in the door to request this time.  
> It is bad, I believe, only in the sense that scheduling the experiment 
> during 12MSD is logistically difficult.   A short time ago I presented 
> to the 12MSD team our beam and clock hour requirements, and now they 
> are seeking to understand the pros and cons of when (not if!) our 
> experiment is scheduled.
>
> There are likely three options that will be weighed against one 
> another; a) delaying 12MSD activities at the INJ/NL by 2-3 weeks to 
> allow the full experiment to occur beginning mid-May, b) postponing 
> the experiment into the Fall (September/October?) time frame w/ 
> potentially less constraint on the total number of days/shifts we can 
> run, and c) a compromise of these two, providing for a short 
> commissioning run (days to a week) in mid-May, with the balance of the 
> run occurring later in the shutdown.
>
> Although we are described as a hard working collaboration, we are 
> indeed small and staffing the experiment is a factor.  I realize this 
> is short notice, but can you please take a moment to send me a brief 
> note detailing your /unavailability /to participate in the experiment 
> from May thru December of 2012.  This can be teaching conflicts, 
> unchangeable plans, terms of service/contact that expire, etc.  
> Effectively, your availability to travel to JLAB for extended period 
> of time and perform the experiment.  In addition, please comment on 
> any other pros/cons which you believe impact when the experiment might 
> be performed.
>
> You may reply to the entire collaboration list, but at a minimum 
> please send e-mail to myself and Eric.
>
> Best,
> Joe
>
>
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-- 
Jean-Sébastien Réal
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
53 avenue des martyrs, 38026 GRENOBLE cedex, France
tel: (33)(0)4.76.28.41.75, fax: (33)(0)4.76.28.40.04
http://lpscwww.in2p3.fr/hadrons/hadrons.html

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