Dispersion and betatron matching into the linac
In high energy linear colliders, the low emittance beam from a damping ring has to be preserved all the way to the linac, in the linac and to the interaction point. In particular, the Ring-To-Linac (RTL) section of the SLAC Linear Collider (SLC) should provide an exact betatron and dispersion match from the damping ring to the linac. A beam with a non-zero dispersion shows up immediately as an increased emittance, while with a betatron mismatch the beam filaments in the linac. Experimental tests and tuning procedures have shown that the linearized beta matching algorithms are insufficient if the actual transport line has some unknown errors not included in the model. Also, adjusting quadrupole strengths steers the beam if it is offset in the quadrupole magnets. These and other effects have lead to a lengthy tuning process, which in the end improves the matching, but is not optimal. Different ideas will be discussed which should improve this matching procedure and make it a more reliable, faster and simpler process. 5 refs., 2 figs.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (USA)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 5550468
- Report Number(s):
- SLAC-PUB-5484; CONF-910505--243; ON: DE91013989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATOR FACILITIES
ACCELERATORS
BEAM DYNAMICS
BEAM EMITTANCE
BEAM OPTICS
BETATRON OSCILLATIONS
CORRECTIONS
DISPERSION RELATIONS
ERRORS
LINEAR ACCELERATORS
OSCILLATIONS
STANFORD LINEAR COLLIDER