DOE EPSCoR Proposal

A Positron Source for JLAB

Year 1

1. Install positron beam line.
2. Check positron productions efficiency simulations for 10-20 MeV electrons on Tungsten Target (expecing 17 nA of positrons for a 10mA electron beam at E=?)
3. Investigate differences between simulation and data, most likely need another week of beam to change configuration

Year 2

1. Measure production efficiency for different Tungsten converter target thicknesses (100 microns -> 1mm in 100 micron steps)
2. Measure positron emmitance and compare to simulation predictions
3. Measure brightness as a function of quad setting (quads change emmitance)
4. measure positron output as a function of beam current
5. Begin designing tungsten converter capable of handling high heat load
6. CEBAF can accept particles into acceleration stage as long as $\frac{\Delta E}{E} \leq 10^{-3}$
7. Electrons are injected at 500 MeV (1 GeV) for a 6 GeV (12 GeV) CEBAF. Currently $\frac{\Delta E}{E} \leq 10^{-5}$

Year 3

1. Conceptual Positron source design level 1 (CD1)
2. IAC beam is x 40 less power than what will be needed at JLAB

Parts list

1. FC $5k 400 W max power
2. harp scanner $20k