[Tpe] Mont's presentation to JSA

[burkert]

Hello,
you guys shouldn't get too excited about all this.

First of all, TPE was never scheduled to run this fall, and just 
pretending it was doesn't make it true. However, I am indeed considering 
this as one of two options in case HDIce isn't ready, and only then! The 
determination that HDIce will not be ready cannot be made much earlier 
than at the end of May, or early June. If the TPE run is so important 
(which I think it is) then you guys should be able to adjust your 
schedules accordingly.

We at Jlab are currently planning ahead to modify the beamline and 
shielding configuration during the 6 weeks summer down, in case TPE will 
be substituting for HDIce. The 6 weeks is all the time we have 
available. If your travel plans conflict with that, that is too bad.

The other option we consider is running PRIMEX II. These folks seem to 
have  fewer problems in being available to prepare the run. In fact, 
they already got their calorimeter fully checked out during the spring 
down time, and they have the advantage that less effort is required to 
get this experiment ready.

There are a number of things that we need to have checked from the TPE 
group. The large luminosity gap from the test run needs to be 
demonstrated to a review committee to have been closed (I have seen the 
rreport where the claim is made. This is a good start,  but is not 
sufficient). The radiation dose level at the focal plane that I 
mentioned to Dave as a potential problem, needs to be studied (Pawel 
from RadCon may be able to help). The protection of the drift chamber 
system is another concern.  We will have stringent upper limits in 
occupancies during the run.

In general, we should not display an attitude that we don't care what 
experiment comes after us, because TPE is so much more important than 
others.

Again, according to our current schedule TPE can only run if HDIce is 
not ready. If you want to change the priority you need to convince other 
people.

Volker




  Brian A Raue wrote:
> Hi All,
> 	From my point, it is crucial that a decision regarding the running of 
> TPE this fall be made as soon as possible.  I have been awarded a 
> sabbatical for the fall in the anticipation that we will run.  If not, I 
> have to either reschedule the sabbatical or find something else to do soon.
> 	Further, I have a grad student now working on the experiment.  If we 
> don't run then I need to find him another project.  It is unfair to the 
> student for him to spend a significant amount of time preparing for TPE 
> only to have it pulled out from under him.
>
> Brian
>
> Larry Weinstein wrote:
>   
>> Dear TPEers,
>>
>> There was an interesting paragraph in Mont's March 10 JSA presentation 
>> (slide 21, titled 'FY11 Guidance Scientific Objectives'):
>>
>>     Hall B:
>>     • Complete data taking on N* with polarized HDIcetarget (especially
>>     neutron
>>     data).  Note original plan was to complete this experiment in FY11;
>>     it will likely
>>     be delayed, and we may try to advance PRIMEx-II into this period
>>     instead if
>>     adequate equipment funding is available
>>
>>
>> It is interesting a) that HDIce uncertainties are already known at the 
>> director's level and b) that Primex is still listed as the most likely 
>> experiment to run in its place.
>>
>> -- 
>> 				Sincerely,
>> 				Larry 
>>
>> -----------------------------------------------------------
>> Lawrence Weinstein
>> University Professor 
>> Physics Department
>> Old Dominion University
>> Norfolk, VA 23529
>> 757 683 5803
>> 757 683 5809 (fax)
>> weinstein at odu.edu <mailto:weinstein at odu.edu>
>> http://www.physics.odu.edu/~weinstei
>>
>>
>> ------------------------------------------------------------------------
>>
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>