منابع مشابه
Influence of an electrostatic LEBT chopper on linac beam parameters at CNAO
The Centro Nazionale di Adroterapia Oncologica (CNAO) located in Pavia, Italy, will be the first Italian facility for hadrontherapy of deeply sited tumours [1]. The accelerator consists of a RFQ and of an IH-type drift tube linac, both delivered by GSI [2], followed by a synchrotron built by CNAO. In the low energy beam line (LEBT), an electrostatic chopper horizontally deflects the DC ion sour...
متن کاملDevelopment of a Fast Traveling-wave Beam Chopper for the National Spallation Neutron Source*
High current and severe restrictions on beam losses, below 1 nA/m, in the designed linac for the National Spallation Neutron Source (NSNS) require clean and fast — with the rise time from 2% to 98% less than 2.5 ns to accommodate a 402.5-MHz beam structure — beam chopping in its front end, at the beam energy 2.5 MeV. The R&D program includes both modification of the existing LANSCE coax-plate c...
متن کاملDesign and Test of a Beam Transformer as a Chopper
This paper introduces a new type of chopper, which is similar to a beam transformer first discussed by R. Wideroe[1]. It is based on the fact that the RFQ has a rather small energy window. A pulsed beam transformer that provides 10% energy modulation to the beam in front of an RFQ can effectively chop the beam. It has fast riseand fall-time and a short physical length. A prototype, which consis...
متن کاملElectromagnetic Modeling of Fast Beam Chopper for Sns Project
High current and stringent restrictions on beam losses in the designed linac and storage ring for the Spallation Neutron Source (SNS) require clean and fast – with the rise time from 2% to 98% less than 2.5 ns – beam chopping in the linac front end, at the beam energy 2.5 MeV. The development of new traveling-wave deflecting current structures, based on meander lines, for the SNS fast chopper i...
متن کاملTest Results of a Fast Beam Chopper with Ma Cores
A new type of fast beam chopper was developed and installed at the HIMAC facility. Test operations of the chopper have been carried out. The chopper is basically a periodic beam-energy transformer that performs 10% modulation of beams kinetic energy. The modulated fraction of the beam is chopped off by the downstream RFQ due to the relatively narrow injection energy window of the RFQ. Some of ...
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ژورنال
عنوان ژورنال: Hyperfine Interactions
سال: 1986
ISSN: 0304-3843,1572-9540
DOI: 10.1007/bf02395000