Title :
H- injection into the low-energy booster of the SSC
Author :
Colton, E.P. ; Thiessen, H.A.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
Protons are accumulated into the low-energy booster of the SSC (Superconducting Super Collider) by utilizing H-→H+ conversion in a 225-μg/cm2 carbon stripping foil. Synchronous injection is performed for 26 turns into stationary RF buckets, thereby allowing operation with variable bunch spacing. By injecting the beam offset in x and y, the required RMS normalized transverse emittance area of 0.75 π mm-mr is obtained. Similarly, the required RMS longitudinal emittance area of 1.75 μ×10-3 eVs is obtained by injecting single linac micropulses, centered at φ=0 and dp/p=+0.12%, into each 49.9-MHz RF bucket formed with an RF voltage of 350 kV. The transverse space-charge tune shift is -0.17 for 1010 protons/bunch accumulated at 600 MeV
Keywords :
proton accelerators; synchrotrons; 49.9 MHz; C stripping foil; H- injection; H- to H+ conversion; RMS longitudinal emittance area; RMS normalized transverse emittance area; SSC; Superconducting Super Collider; low-energy booster; proton accumulation; stationary RF buckets; synchronous injection; transverse space-charge tune shift; variable bunch spacing; Filling; Linear particle accelerator; Predictive models; Protons; Strips; Synchrotrons; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73065
