JLAB Positron Source DOE Award DE-SC0002600

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Award Info

8/15/09 - 8/14/2012

Funds Obligated: $381,509

Funds Requested: $411,509

Sponsored Project Proposal Number : 8-17

DOE Award Number : DE-SC0002600

Accounts set up on 10/14/09

Banner Index : RACL39 Account Numer : 684-143-40

Fund: X10165, Org code: 640000, Program : 040R0

Final Report

DOE Award #: DE-SC0002600

Project Title: The Development of a Positron Source for JLab at the IAC

Date: 8/1/13

Period covered: 8/15/09-8/14/2013 (Final Report)

Accomplishments

The performance of positron source using a quad triplet collection system has been measured using the support from this award.

Initial Positron production measurement

An initial set of positron production efficiency measurements were performed


Chips run-2008 setup.png
The beam line used for an initial set of positron production measurements


Item Description
Tantalum Foil 6 mm thick 20 mm x 20 mm area
Tungsten Foil 2 mm thick 20 mm x 20 mm area
Phosphorus Flag 1 mil aluminum backing
Media:HpGe_Crystal_GEM-60195-Plus-P.pdf 81.3mm Diameter, 55.5mm Length
NaI detector
Run60 HpGe-NaI.gif PositronYield SweeperMagnet run60-61.gif
The observed photon energy distributionas as measured by the HpGe (top) and NaI (bottom) detectors. The HpGe photon energy distribution before and after a sweep magnet is used to deflect charged particles away from the conversion target.

2nd Generation positron source

BeamLine Yim 10-14-10.png
HRRL beamline for positron generation.