Application of superconducting cavities to the collider rings of the SSC

Conference · Sun Mar 01 04:00:00 EST 1992

OSTI ID:10137979

Schaffer, G

The rf parameters of the SSC collider rings are briefly characterized by 20 MV peak rf voltage, 3.9 MeV acceleration per turn, and 2 MW rf power ring at a multiple of the 60-MHz bunch frequency of the proton beam injector. 360 or 480 MHz are preferred frequency choices. In the references design, a normalconducting accelerating structure is foreseen which would operate with gradients of typically 1 MV/m. In contrast to this, superconducting cavities can generate fields of 5 MV/m, or possibly more. In combination with a low R/Q-value, the total stored energy in the rf structure could be increased by an order or magnitude. This would help to reduce the undesired effects of transient beam loading, of rf generator noise, and of imperfections in the generator feedforward current, resulting in reduced phase modulation of the particle bunches at the collision area. For 70 mA circulating beam current, eight superconducting single-cell cavities would be required per ring, instead of 32 to 40 single-cell normalconducting cavities. The savings in tunnel space, and a lower coupling impedance would allow a later upgrade of the beam current to and beyond 200 mA, if desired, for a higher collider luminosity.

• Research Organization: Superconducting Super Collider Lab., Dallas, TX (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC35-89ER40486
• OSTI ID: 10137979
• Report Number(s): SSCL-Preprint--80; CONF-920315--16; ON: DE92011692
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303
BEAM INJECTION
BEAM LUMINOSITY
COLLIDING BEAMS
COST
EXPERIMENTAL FACILITIES AND EQUIPMENT
RF SYSTEMS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING SUPER COLLIDER