Estimate of the longitudinal and transverse impedances for the superconducting super collider

Technical Report · Sun Jan 01 00:00:00 EST 1984

DOI:https://doi.org/10.2172/5246684· OSTI ID:5246684

Ng, K Y

We try to estimate the longitudinal impedance per harmonic Z/sub L//n as well as the transverse impedance Z/sub T/ for the 20 TeV Superconducting Super Collider (SSC). Effects due to space charge, wall resistivity, bellows, monitor plates, synchrotron radiation are considered. The resulting Z/sub L//n and Z/sub T/ are plotted. Such a knowledge of Z/sub L//n and Z/sub T/ is necessary in computing the limits of many types of instabilities for the bunched beam. To be more specific, in our estimation, we consider the special case of an injection energy of 1 TeV and assume a maximum field of 5 Tesla in the SSC dipoles. In some cases, we also assume a 60/sup 0/ FODO cell structure consisting of 4 dipoles and 2 quadrupoles each with 2 long straight sections. The beampipe radius and beam radius are chosen as b = 1.0 in. and a = 0.05 cm respectively. Totally, the storage ring consists of 364 cells and has a mean radius of R = 17.38 km. Our results show that when monitor plates matched at both ends (such as the ones used in the Tevatron) are used, their effects dominate both Z/sub L//n and Z/sub T. 7 references, 5 figures.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 5246684
• Report Number(s): FERMILAB/TM-1239; ON: DE84009404
• Resource Relation: Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
SUPERCONDUCTING SUPER COLLIDER
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IMPEDANCE
BEAM MONITORS
STABILITY
SYNCHROTRON RADIATION
TEV RANGE 10-100
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ENERGY RANGE
MEASURING INSTRUMENTS
MONITORS
RADIATIONS
STORAGE RINGS
TEV RANGE
430100* - Particle Accelerators- Design
Development
& Operation