Advanced light source storage ring rf system

Conference · Wed Mar 01 04:00:00 EST 1989

OSTI ID:5885277

Taylor, B; Baptiste, K; Lancaster, H; Lo, C C

The short electron bunch length (30ps design target) of the Advanced Light Source (ALS) stored beam is capable exciting a wide spectrum of higher order mode (HOM) frequencies. Further, the small aperture and low cut off frequency of the beam enveloping components does not allow for transmission and consequent attenuation of the lower frequency HOM components. The small cross section and divergence of the high brightness electron beam will allow for more sophisticated high resolution experiments by synchrotron radiation users. A more stringent requirement on beam position stability results, however. In this area transmitted mechanical vibration becomes a problem. The ALS RF system splits 300kW of CW 500MHz power between two single cell cavities. Compared to past practice this power rating is high. The use of only two cavities however has some advantages, it simplifies the waveguide feed system and releases room in straight sections for insertion devices, more important it reduces HOM and beam impedance problems. 3 refs., 2 figs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5885277
• Report Number(s): LBL-25978; CONF-890335-242; ON: DE89016349
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430400* -- Particle Accelerators-- Storage Rings
BEAM BUNCHING
BEAM DYNAMICS
BEAM POSITION
CAVITY RESONATORS
ELECTRIC IMPEDANCE
ELECTRONIC EQUIPMENT
EQUIPMENT
IMPEDANCE
MECHANICAL VIBRATIONS
RESONATORS
RF SYSTEMS
STORAGE RINGS