Title :
Measuring emittance growth due to magnetic bunching of an electron beam using the second moment of its image charge
Author :
Russell, S.J. ; Carlsten, B.E.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
Current thinking about the Next Linear Collider (NLC) places a great deal of importance on magnetic beam compression. However, theoretical work has predicted that a large emittance growth may occur during magnetic compression due to coherent synchrotron radiation and the non-inertial space-charge force. Applications such as the NLC cannot tolerate such beam degradation. To verify this prediction we have measured the emittance of the Sub-Picosecond Accelerator electron beam as a function of compression in our magnetic chicane and compared the results to numerical simulation. These emittance measurements were carried out using a pair of quadrupole magnets and a beam position monitor
Keywords :
accelerator magnets; electromagnets; electron accelerators; electron beams; linear colliders; particle beam bunching; particle beam diagnostics; space charge; NLC; Next Linear Collider; Sub-Picosecond Accelerator; beam degradation; beam position monitor; coherent synchrotron radiation; electron beam; emittance growth measurement; image charge; magnetic beam compression; magnetic bunching; magnetic chicane; noninertial space-charge force; quadrupole magnets pair; second moment; Accelerator magnets; Colliding beam devices; Degradation; Electron accelerators; Electron beams; Electron emission; Monitoring; Numerical simulation; Position measurement; Synchrotron radiation;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795737
