SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS

A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 43, ISSUE 26 - DECEMBER 30, 2006

14 GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
Includes launch complexes, research and production facilities; ground support equipment, e.g., mobile transporters; and test chambers and simulators.

Also includes extraterrestrial bases and supporting equipment.

For related information see also 09 Research and Support Facilities (Air).

20050243439 Jefferson (Thomas) Lab. Computer Center, Newport News, VA, USA

Injections Options for 12 GEV CEBAF Upgrade

Kazimi, R.; Benesch, J. F.; Chao, Y.; Grames, J. M.; Krafft, G. A.; January 2005; 8 pp.; In English Report No.(s): DE2005-840296; No Copyright; Avail.: Department of Energy Information Bridge

Jefferson Lab is planning a major upgrade of CEBAF accelerator from 6 to 12 GeV. The injection energy needs to be increased accordingly from 67 MeV to 123 MeV. While the present 100 keV electron gun and beam formation up to 5 MeV would remain unchanged, the accelerating SRF modules in the current injector cannot provide the desired energy increase. Two options for attaining the energy increase have been considered: (1) replacing the present injector SRF modules with new, higher gradient modules, or (2) re-circulating the electron beam through the existing cryomodules to achieve the necessary energy gain in two passes. In this paper we present computer simulation studies for these two options of the injector upgrade and list their advantages and disadvantages. NTIS

Linear Accelerators; Injection; Computerized Simulation

20050245055 Lawrence Livermore National Lab., Livermore, CA USA

Simulation of Integrated Beam Experiment Designs

Grote, D. P.; Sharp, W. M.; Jun. 11, 2004; 16 pp.; In English Report No.(s): DE2005-15014276; UCRL-CONF-204669; No Copyright; Avail.: Department of Energy Information Bridge

Simulation of designs of an Integrated Beam Experiment (IBX) class accelerator have been carried out. These simulations are an important tool for validating such designs. Issues such as envelope mismatch and emittance growth can be examined in a self-consistent manner, including the details of injection, accelerator transitions, long-term transport, and longitudinal compression. The simulations are three-dimensional and time-dependent, and begin at the source. They continue up through the end of the acceleration region, at which point the data is passed on to a separate simulation of the drift compression. Results are presented. NTIS

Beam Currents; Design Analysis; Experiment Design; Simulation

Source: NASA.