April 10, 2013

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We will meet in ARC 428 on Wednesday April 10 at 3pm EST.

For those calling in we'll use the ReadyTalk audio conference system.

1. Dial Toll-Free Number: 866-740-1260 (U.S. & Canada)
2. Enter 7-digit access code 3441852, followed by “#”

Topics

Removing Mott scattering chamber

Media:130410_Dismount.pdf

Time of flight results

Media:130410_TOF.pdf

Valeri Tioukine's Mott analysis

Media:Tioukine_MITPEB.pdf

Beam Time

* Beam time for each target using S0 (assume no dependence of Sherman function on target thickness) and no limit on DAQ rate. 
Gold (Au, Z=79), Silver (Ag, Z=47), Copper (Cu, Z=29). Note that:
Figure of Merit (fom) ~ sigma * S^2 ~ Z^4. 
Beam Time ~ 1/fom = 1/Z^4

Euncer pol.gif

* Beam Time for Gold with target thickness correction and DAQ rate < 5000 Hz.

Au TimeDAQ.gif

* Beam Time for Silver with target thickness correction using Gold extrapolation and DAQ rate < 5000 Hz.

Ag TimeDAQ.gif

* Beam Time for Copper with target thickness correction using Gold extrapolation and DAQ rate < 5000 Hz.

Cu TimeDAQ.gif

* Note: Target thickness extrapolation used above:

- Alpha as a function of Kinetic Energy: alpha = 0.0066 + 0.052 * kine

- Effective Sherman Function: eff_sf = S0 /(1.0 + alpha * d)

Au target1.gif

Au alpha1.gif