Difference between revisions of "Sadiq IPAC 2012"

From New IAC Wiki
Jump to navigation Jump to search
Line 17: Line 17:
 
|-
 
|-
 
|
 
|
[[image:BeamLine_Yim_10-14-10.png | 500 px |thumb|Fig. HRRL beamline.]]
+
[[image:BeamLine_Yim_10-14-10.png | 500 px |thumb|Fig. HRRL beamline.]] || [[image:hrrl_2011_mar_emit_test_quad_scan_quad.png | 400 px |thumb|Fig. Imaging system for HRRL.]]
|}
 
 
 
 
 
{| border="0" style="background:transparent;"  align="center"
 
|-
 
|
 
[[image:hrrl_2011_mar_emit_test_quad_scan_quad.png | 400 px |thumb|Fig. Imaging system for HRRL.]]
 
 
|}
 
|}
  

Revision as of 05:43, 3 November 2011

Emittance Measurement of Varian Medical Linac

Abstract

Emittance of Varian High Rep-Rate Linac (HRRL) was measured with Optical Transition Radiation (OTR) at 14 MeV. Electron beam was observed at 10 [math]\mu m [/math] thick Al screen. Projection of beam appear to be sharper than Gaussian distribution, and super-Gaussian distribution were fitted. Quadrupole scanning method shows that horizontal and vertical are [math]11.4 \pm 0.6~\mu m[/math] and [math] 9.3 \pm 1.8~\mu m[/math] respectively.


Introduction

Experiment Setup

Experimental setup is shown in the following two figures.

Fig. HRRL beamline.
||
Fig. Imaging system for HRRL.

We chose one of the quad at a time to do the scan and turned off all the other quads. Optical transition radiation was observed at OTR target. At the end of 0 degree beamline we have a Faraday cup to measure the charge of the beam. Camera cage system was located below the OTR target. There are 3 lenses used to focus lights from target to the CCD camera. Target can be pushed into or taken out of the beamline by the actuator at the top.








Go back