Title :
Real time spectrum analyzer
Author :
Bergher, M. ; Jules, E. ; Louis-Joseph, A.
Author_Institution :
Lab. pour l´´Utilisation du Rayonnement Electromagn., Univ. de Paris-Sud, Orsay, France
Abstract :
A real time spectrum analyzer (RTSA) has been designed for the 50-MeV RF linac (linear accelerator) of the free electron laser. It displays in real time the beam distribution in 2 dimensions: energy and time with a resolution of 0.3% and 64 sampled times, respectively, during the macropulse. The RTSA is based on an optical transition radiation converter and linear diode array. It allows measurement of the beam energy distribution along the macropulse with and without laser oscillation. RTSA includes in the same frame a 32-channel transient recorder and a digital oscilloscope with 8-b amplitude resolution. It offers multiple presentation: 1 to 128 curves can be displayed simultaneously in three dimensions. Preliminary tests on a 20-MeV linac facility are reported. The results show the unique abilities of the device to identify and correct the various inst ilities that may appear in the operation of an RF linac.<>
Keywords :
electron accelerators; linear accelerators; particle beam diagnostics; spectral analysers; digital oscilloscope; free electron laser; linac; linear accelerator; linear diode array; optical transition radiation converter; particle beam diagnostics; real time spectrum analyzer; transient recorder; Energy resolution; Free electron lasers; Laser beams; Laser transitions; Linear particle accelerator; Optical arrays; Optical design; Radio frequency; Semiconductor laser arrays; Spectral analysis;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164588
