Contributions to the Workshop on an e+e- collider in the VLHC tunnel

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This Workshop was extremely useful in fleshing out many of the details related to the VLLC. For example, at the workshop it became very clear that the large machine could not provide high luminosity polarized beams at both the Z0 pole and at high energy, and it would be best to provide the Z0 factory function in the injector. In addition, the workshop identified a number of topics for further R and D. A list of some of these topics follows: What is the lower limit on {beta}{sub y}* in the high energy collider? What is a reasonable upper limit ... continued below

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al., E Keil et July 16, 2001.

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This Workshop was extremely useful in fleshing out many of the details related to the VLLC. For example, at the workshop it became very clear that the large machine could not provide high luminosity polarized beams at both the Z0 pole and at high energy, and it would be best to provide the Z0 factory function in the injector. In addition, the workshop identified a number of topics for further R and D. A list of some of these topics follows: What is the lower limit on {beta}{sub y}* in the high energy collider? What is a reasonable upper limit on the beam-beam parameter at 183 GeV? Is there a way to coalesce electron bunches at high energy to finesse the TMCI current limit at injection, allowing a smaller beam pipe aperture to be used? Can feedback systems be useful to combat the TMCI instability at injection? In the 45 GeV Z{sup 0} factory, are two rings essential? Are wigglers essential for polarization in the Z{sup 0} factory? How can polarization at high energies be optimized? What is the optimum method of pumping the long vacuum chamber sections? How much cost and power minimization is possible in the complete design? What is the cost of the final system? How can the low field magnets be optimized (alloys, lamination shapes, etc.)? How do we get adequate shielding of the beam from the environment? How can we eliminate the Q-slope in superconducting rf cavities using sputtered niobium on copper? It is hoped the VLLC concept will be explored further, and some of these questions will be addressed, at the Snowmass 2001 Workshop.

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1078 Kilobytes pages

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  • Workshop on an e+e- collider in the VLHC tunnel, Chicago, IL (US), 03/09/2001--03/11/2001

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  • Report No.: FERMILAB-Conf-01/107-T
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 782918
  • Archival Resource Key: ark:/67531/metadc724541

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  • July 16, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 1, 2016, 5:19 p.m.

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al., E Keil et. Contributions to the Workshop on an e+e- collider in the VLHC tunnel, article, July 16, 2001; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc724541/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.