Title :
The Final Focus Test Beam laser reference system
Author :
Bressler, V.E. ; Ruland, R.E.
Author_Institution :
Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The original design for the SLAC linac included an alignment reference system with 270 diffraction gratings situated along the 3000 meter linac. These gratings have provided SLAC with a global reference line repeatable to within 200 micro meters. For the Final Focus Test Beam, this laser system has been extended and 13 new diffraction grating have been installed. Improvements in the image detection system, in the calibration of the targets and the availability of new instruments allows us to evaluate the performance of the laser reference system at the 5-10 micro meter level. An explanation of the system and the results of our evaluation are presented
Keywords :
beam handling techniques; diffraction gratings; electron accelerators; laser beam applications; linear accelerators; 3000 m; Final Focus Test Beam laser reference system; SLAC linac; alignment reference system; diffraction gratings; global reference line; image detection system; target calibration; Cameras; Charge coupled devices; Charge-coupled image sensors; Diffraction gratings; Focusing; Fresnel reflection; Laser beams; Linear particle accelerator; Measurement standards; System testing;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309516
