An emittance measurement system for a wide range of bunch charges
- 23 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2, 2201-2203
- https://doi.org/10.1109/pac.1997.751155
Abstract
As a part of the emittance measurements planned for the FEL injector at the Thomas Jefferson National Accelerator Facility (Jefferson Lab.), we have developed an emittance measurement system that covers the wide dynamic range of bunch charges necessary to fully characterize the high-DC-voltage photocathode gun. The measurements are carried out with a variant of the classical two-slit method using a slit to sample the beam in conjunction with a wire scanner to measure the transmitted beam profile. The use of commercial, ultralow noise picoammeters makes it possible to cover the wide range of desired bunch charges, with the actual measurements made over the range of 0.25 pC to 125 pC. The entire system, including its integration into the EPICS control system, is discussed.Keywords
This publication has 2 references indexed in Scilit:
- A high-DC-voltage GaAs photoemission gun: Transverse emittance and momentum spread measurementsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Modeling of space charge dominated performance of the CEBAF FEL injectorNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1995