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TRIUMF brown reports TRI-70-1

TRIUMF

The preliminary design of the beam transport system for TRIUMF beam line 1, as described in report TRI-68-8¹ and updated by communications with the University of Victoria group, was reviewed. Special attention was given to the portion of the transport system located between the combination magnet and the first target since it was felt that substantial cost savings could be realized by simplifications of this beam transport section. Four basic systems were studied, namely: 1) A system with three 30 deg bending magnets whereof one - the middle - creates a reverse bend (reverse bend system) 2) A modified achromatic system with three or four identical gradient bending magnets (gradient-magnet bend system) 3) A modified-achromatic system with two 15 deg bending magnets (two-magnet bend system) a) A dispersion-correcting system with one 30 deg bending magnet having wedge-shaped poles (single-magnet bend system/wedge magnet) b) A dispersion-correcting system with one 30 deg bending magnet having rectangular poles (single-magnet bend system/rectangular magnet) For transport of the beams between targets T1 and T2 as well as between targets T2 and T3, the use of the symmetric identity sections described in TRI-68-8 was adopted after certain aperture adjustments to permit acceptance of 95.5% of the beam emerging from a target with a thickness of 5 g cm⁻² . The transport of the beam from target T3 to the neutron target (beam dump) is done by a transport system described in memorandum by M. Tautz² (May 13, 1969). This system supersedes the one outlined in TRI-68-8. Cost estimates have been made for beam transport systems 1), 4a) and 4b) above, in combination with two identity sections and the revised system for transport of the beam from target T3 to the beam dump. Based on the results of the study work done, it is recommended that a dispersion-correcting beam transport system consisting of eight quadrupole magnets, a combination magnet and a 30 deg bending magnet, both with square pole tip edges, be used in beam line 1. The total recommended beam line is shown in Figure 1. The total cost of the recommended system, including all magnets with stands, all power supplies, and vacuum tanks for the magnets, but not including water cooling system, beam pipe, vacuum system, controls or beam diagnostic equipment, is estimated at $285,667.(US).

Report

eng

Vancouver : University of British Columbia Library

10.14288/1.0107838

TRIUMF

Researcher

http://creativecommons.org/licenses/by-nc-nd/2.5/ca/