[PEPPo] Weekly Status Meeting = OFF, Accelerator Seminar = ON

[Joseph Grames]

Dear PEPPo Collaborator:

Our weekly status update meeting is cancelled.

In lieu of our meeting, I invite you to attend Wednesday's Accelerator 
Seminar.  Serkan will discuss options for a cw positron source concept 
at CEBAF and the FEL.  Please find details of the seminar below.

Also, I encourage your attendance at the PEPPo presentation to PAC38 on 
Thursday at 9:00am in the CC Auditorium.

Best,
Joe

ACCELERATOR SEMINAR

"Beware the Lepton Sign Change:  C.W. Positron Beam at JLab"

Speaker:  Serkan Golge

There are more than a hundred small-scale and a few number of 
large-scale positron facilities around the world. These facilities 
mainly use radioisotope sources, nuclear reactions and linacsto obtain 
positrons depending on the purpose and intensity requirements. At 
Jefferson Lab, there are two injectors (CEBAF and FEL injectors), which 
can provide 100% duty cycle, high quality and high energy electrons to 
create positrons via pair production. For the CEBAF injector, the energy 
will go up to 125 MeVwhen the 12 GeVupgrade is completed. The current 
FEL energy achievement is up to 135 MeV. In this talk, I will be 
presenting feasibility studies for a multi-purpose c.w. positron beam 
utilizing either of these injectors. The feasibility study includes 
optimization of the positron efficiency, and power deposition in the 
target and surrounding elements, capture and transfer optics. For the 
purpose of re-acceleration, 3 uAof positron current is achievable under 
certain boundary conditions by using CEBAF injector. For low energy 
applications 1013e+/s can be obtained by using FEL electron beam.


Wednesday, August 24, 2011
10:00 a.m.
CEBAF Center, F113


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