Bulletin of the American Physical Society
APS April Meeting 2012
Volume 57, Number 3
Saturday–Tuesday, March 31–April 3 2012; Atlanta, Georgia
Session D6: Invited Session: Accelerator Driven Systems |
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Sponsoring Units: DPB Chair: William Barletta, Massachusetts Institute of Technology Room: Embassy C |
Saturday, March 31, 2012 3:30PM - 4:06PM |
D6.00001: High Power Linacs for ADS Invited Speaker: John Galambos Accelerator Driven Sub-critical (ADS) fission systems are proposed for energy production and for burners of long-lived fission product wastes. Generally the ADS concepts involve using beams of $\sim $ 1 GeV protons with powers of $\sim $10 MW. An important requirement is high reliability, with minimal machine trip rates. Superconducting RF powered linear accelerators have been proposed as an accelerator choice, as an approach to high reliability, modest operating cost accelerator technology. The advantage in operational reliability arises from the possibility of providing additional standby accelerating cavities that can be rapidly brought online to compensate for accelerating components that may have equipment issues. Also, the recent demonstration of 1 MW, 1 GeV proton beam operation with a superconducting linac for over 5000 hours/year at the Spallation Neutron Source (SNS) offers confidence in the approach. A description of the technologies involved in high power proton linacs and a review of the SNS experience will be given. Also beam loss requirements and experience will be discussed. [Preview Abstract] |
Saturday, March 31, 2012 4:06PM - 4:42PM |
D6.00002: High Power Cyclotrons for Accelerator Driven System (ADS) Invited Speaker: Luciano Calabretta We present an accelerator module based on a injector cyclotron and a Superconducting Ring Cyclotron (SRC) able to accelerate H2+ molecules. H2+ molecules are extracted from the SRC stripping the binding electron by a thin carbon foil. The SRC will be able to deliver proton beam with maximum energy of 800 MeV and a maximum power of 8 MW. This module is forecasted for the DAEdALUS (Decay At rest Experiment for $\delta _{cp}$ At Laboratory for Underground Science) experiment, which is a neutrino experiment proposed by groups of MIT and Columbia University. Extensive beam dynamics studies have been carrying out in the last two years and proved the feasibility of the design. The use of H2+ molecules beam has three main advantages: 1) it reduces the space charge effects, 2) because of stripping extraction, it simplifies the extraction process w.r.t. single turn extraction and 3) we can extract more than one beam out of one SRC. A suitable upgraded version of the cyclotron module able to deliver up to 10MW beam is proposed to drive ADS. The accelerator system which is presented, consists of having three accelerators modules. Each SRC is equipped with two extraction systems delivering two beams each one with a power up to 5 MW. Each accelerator module, feeds both the two reactors at the same time. The three accelerators modules assure to maintain continuity in functioning of the two reactors. In normal operation, all the three accelerators module will deliver 6.6 MW each one, just in case one of the three accelerator module will be off, due to a fault or maintenance, the other two modules are pushed at maximum power of 10 MW. The superconducting magnetic sector of the SRC, as well as the normal conducting sector of the injector cyclotron, is calculated with the TOSCA module of OPERA3D. Here the main features of the injector cyclotron, of the SRC and the beam dynamic along the cyclotrons are presented. [Preview Abstract] |
Saturday, March 31, 2012 4:42PM - 5:18PM |
D6.00003: Nuclear Engineering Issues of ADS Invited Speaker: Sama Bilbao y Le\'on |
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