[Cuga] CORRECTION DATE!!!Graduate Student Luncheon: Thursday, November 18th at noon

[Rachel Harris]

Please RSVP to: harris at jlab.org by Wednesday, November 17th.

Feasibility and Conceptual Design of a C.W. Positron Source at CEBAF

*Serkan Golge*
North Carolina Central University

*Due to a conflict, the Seminar has been moved to:
Thursday, November 18, 2010
12:00-1:30pm
CC F113

Abstract

A feasibility study of a CW positron source for the 12 GeV upgrade at
Jefferson Lab (JLAB) is provided. The proposed >=100 nA Continuous
Wave (CW) positron source at JLAB has several unique and challenging
characteristics: high current incident electron beam at 126 MeV with a
high beam power (up to a MW); CW electron beam and CW positron production.
The optimization of the target thickness and beam energy are completed.
Three positron injector configurations are proposed; Combined Function
Magnet, Two-Dipole and Microtron Dipole configurations. By using 126 MeV
10 mA e- beam impinging on a 2 mm W target with a 100 micron spot size,
we can get up to 3 uA useful e+ current at the North Linac connection. One
of the biggest challenges is the target design, which the deposited power
is about 60 kW. Possible solutions are presented to address the target
issue as well.


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