Difference between revisions of "Optimization of Positron Capturing"
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=== Y phase space === | === Y phase space === | ||
+ | [[File:e+_Y-Phase-Space_Ellipse_39-Per_Particles.png | 300 px]] | ||
==Transverse Beam Size== | ==Transverse Beam Size== |
Revision as of 23:59, 3 October 2011
- Thickness of the Tungsten target: 1.25 mm
- Beam size at Tungsten target: Gaussian,
Optimization with ELEGANT Simulation on the Region from Gun Exit to Tungsten Target
Emittance:
(Not sure yet, need to be calculated)Average Peak
Beam Energy:
Energy Spread:
Alpha Function:
Beta Function:
RMS longitudinal Bunch Length:
GEANT4 Simulation for 2 mm W-Target
Thickness of the Tungsten target: 2 mm
Electron Beam:
Beam size at Tungsten target: Gaussian,
Beam divergence at target: 0
Beam Energy:
Energy Spread:
A volume called "detector" is placed at the of the W-target to get the information on the only of the outgoing positrons from the W-target. Followings are from "detector".
Phase Spaces of e+ Created
Phase space for positrons coming out W-target. Include 100 % of the particles
X phase space
Y phase space
Phase Spaces ellipse of 39% particles
Total positrons created are 75483, and 39 % of them will be 29438. Core 39% area of the phase space ellipse is RMS emittance,
.Long and short axis of these two ellipse are: a = 3.791; b = 1.189;
X phase space
Y phase space
Transverse Beam Size
Y
Transverse Beam Divergence
X
FCN=1205.9 FROM MIGRAD STATUS=CONVERGED 60 CALLS 61 TOTAL EDM=9.41429e-08 STRATEGY= 1 ERROR MATRIX ACCURATE EXT PARAMETER STEP FIRST NO. NAME VALUE ERROR SIZE DERIVATIVE 1 Constant 2.08367e+03 9.54533e+00 1.29688e-01 1.45076e-05 2 Mean 1.65233e-03 2.93970e-03 4.98630e-05 -1.42668e-01 3 Sigma 7.32175e-01 2.40413e-03 1.53830e-05 8.15997e-02