Paper |
Title |
Page |
TUPB094 |
High Power Tests of TRASCO RFQ Couplers |
681 |
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- E. Fagotti, L. Antoniazzi, F. Grespan, A. Palmieri, F. Scarpa
INFN/LNL, Legnaro (PD), Italy
- O. Brunasso Cattarello, R. Panero
INFN-Torino, Torino, Italy
- M. Desmons
CEA/DSM/IRFU, France
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The 352.2 MHz 7.13 m long TRASCO RFQ requires an overall amount of 900 kW CW RF power in order to deliver the 40 mA proton beam from the initial energy of 80 keV to the final energy of 5 MeV. For such a purpose a system of eight compact (ϕext=38 mm, ϕint=19.4 mm) loop-based couplers was designed. In a first phase, only the first two (out of six) modules of the RFQ were tested at full power. Therefore only two (out of eight) couplers were used. In order to completely characterize these couplers, a dedicated test bench was prepared, consisting of a bridge waveguide and diagnostics (reflected power, vacuum, arc detectors etc.), onto which a couple of couplers was connected for transmission measurements. Each coupler was tested with a forward power of up to 140 kW. The description of the experimental setup and procedure, as well as the main results of the conditioning procedure will be reported in this paper.
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THPLB08 |
High-Power RF Conditioning of the TRASCO RFQ |
828 |
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- E. Fagotti, L. Antoniazzi, F. Grespan, A. Palmieri
INFN/LNL, Legnaro (PD), Italy
- M. Desmons
CEA/DSM/IRFU, France
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The TRASCO RFQ is designed to accelerate a 40 mA proton beam up to 5 MeV. It is a CW machine which has to show stable operation and provide the requested availability. It is composed of three electromagnetic segment coupled via two coupling cells. Each segment is divided into two 1.2 m long OFE copper modules. The RFQ is fed through eight loop-based power couplers to deliver RF to the cavity from a 352.2 MHZ, 1.3 MW klystron. After couplers conditioning, the first electromagnetic segment was successfully tested at full power. RFQ cavity reached the nominal 68 kV inter-vane voltage (1.8 Kilp.) in CW operation. Moreover, during conditioning in pulsed operation, it was possible to reach 83 kV inter-vane voltage (2.2 Kilp.) with a 1% duty cycle. The description of the experimental setup and procedure, as well as the main results of the conditioning procedure will be reported in this paper.
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Slides THPLB08 [1.384 MB]
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THPB040 |
High-Power RF Conditioning of the TRASCO RFQ |
945 |
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- E. Fagotti, L. Antoniazzi, F. Grespan, A. Palmieri
INFN/LNL, Legnaro (PD), Italy
- M. Desmons
CEA/DSM/IRFU, France
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|
|
The TRASCO RFQ is designed to accelerate a 40 mA proton beam up to 5 MeV. It is a CW machine which has to show stable operation and provide the requested availability. It is composed of three electromagnetic segment coupled via two coupling cells. Each segment is divided into two 1.2 m long OFE copper modules. The RFQ is fed through eight loop-based power couplers to deliver RF to the cavity from a 352.2 MHZ, 1.3 MW klystron. After couplers conditioning, the first electromagnetic segment was successfully tested at full power. RFQ cavity reached the nominal 68 kV inter-vane voltage (1.8 Kilp.) in CW operation. Moreover, during conditioning in pulsed operation, it was possible to reach 83 kV inter-vane voltage (2.2 Kilp.) with a 1% duty cycle. The description of the experimental setup and procedure, as well as the main results of the conditioning procedure will be reported in this paper.
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