ORNL, Oak Ridge, Tennessee
BARC, Mumbai
e-mail:piyushj@barc.gov.in
DAE/VECC, Calcutta
DAE/VECC, Calcutta
RRCAT, Indore (M. P.)
RRCAT, Indore (M. P.)
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| MOXMA02 | Commisioning Experience of SNS | linac, target, injection, beam-losses | 6 | ||||
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The Spallation Neutron Source accelerator complex consists of a 2.5 MeV H- front-end injector system, a 186 MeV normal-conducting linear accelerator, a 1 GeV superconducting linear accelerator, an accumulator ring and associated beam transport lines. The linac was commissioned in five discrete runs, starting in 2002 and completed in 2005. The accumulator ring and associated beam transport lines were commissioned in two runs in February and April 2006. With the completed commissioning of the SNS accelerator, the facility has begun initial low-power operations. In the course of beam commissioning, most beam performance parameters and beam intensity goals have been achieved at low duty factor. A number of beam dynamics measurements have been performed, including emittance evolution, transverse coupling in the ring, beam instability thresholds, and beam distributions on the target. The commissioning results, achieved beam performance and initial operating experience of the SNS linac will be presented.
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| TUPMA093 | Thermo-structural Analysis of 400 KeV Deuteron RFQ Components | rfq, vacuum, pick-up, linac | 235 | ||||
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BARC is developing technologies for a high current low energy proton accelerator, which includes a 3MeV RFQ. As part of this, a 400 KeV prototype deuteron RFQ has been planned. This RFQ will also be utilized later to replace 14 MeV neutron generator at BARC. In this paper we are presenting Thermo-structural analysis of RFQ and features such as RF Coupler, Tuner, Vacuum port etc. This investigation will lead to design of local cooling schemes of these components. Parametric studies are also included in this paper. Feasible Cooling schemes which meet cooling requirements of components will also be discussed.
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e-mail:piyushj@barc.gov.in |
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| TUPMA097 | Characteristics of the Magnetic Channel in the Yoke Hole of K-500 Superconducting Cyclotron | cyclotron, ion, extraction, simulation | 241 | ||||
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The detail magnetic field measurement of K-500 superconducting cyclotron has been carried out. The last magnetic channel of the extraction system placed in the yoke hole of the cyclotron before external beam line is active, unlike others, which are all passive. This channel comprises a coil and a special shaped iron to produce both quadrupole and dipole field for focussing and radially aligning the different ion species coming out from the cyclotron, with the external beam transport line. The magnetic field inside the channel along with the outside stray field has been measured for different channel currents as well as main magnet excitations. A 3-D model of the full magnet is constructed using magneto- static code RADIA [2] to simulate the yoke field. This paper reports the comparative study of measured and calculated field and studies the trajectories for the representative ions through the stray field calculated from the model. The later being used to locate the starting point (or matching point) for the external beam transport line
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| WEPMA015 | Characteristics of Beam Extraction System of K500 Superconducting Cyclotron | extraction, cyclotron, ion, emittance | 357 | ||||
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Extensive Magnetic Field measurement of the K500 Superconducting Cyclotron has been completed. In this paper we report the beam dynamical calculations along the extraction system based on the measured magnetic field data. The beam matching to the external beam transport system, for different ion species spanning the operating region is also explored.
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| WEPMA124 | Preliminary Design, Analysis and Manufacturing Aspects of Low Beta 350 MHz Reentrant Superconducting RF Cavity | linac, rfq, proton, cryogenics | 497 | ||||
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A superconducting reentrant cavity for low beta, high intensity beam has been designed using SUPERFISH and MAFIA. The study has been done for cavity shape optimization considering the minimization of surface fields. Further its structural design has been done and feasibility study of different manufacturing aspects has also been done. A full-scale mild steel model with copper coating has been fabricated. A twin arm mechanical tuner has been designed for slow tuning by elastic deformation. This was tested with low power RF to validate the design parameters and to check the tuning sensitivity. In this paper the design and development activity of the reentrant superconducting will be discussed
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| THPMA087 | Prototype Beam Dump For 10 kW LINAC | electron, linac, radiation, radioactivity | 764 | ||||
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A 10 MeV, 10 kW electron LINAC has been developed at RRCAT, Indore for developing applications in the area of radiation processing of agricultural products and medical sterilization. This paper presents the functional requirements, design and manufacturing aspects of beam dump for this LINAC. Activation, conversion of electron energy into primary bremmstralung and radiation damage are important parameters for material selection of the beam dump. Other important parameters considered are mechanical strength, thermal conductivity, corrosion in ozone environment and manufacturability. Calculations of heat deposition due to electrons & photons, thermal design, hydraulic, structural and engineering design were done. FEM based analysis was performed for calculating temperature rise, deformation and stresses. The maximum temperature is estimated to be about 320 K. A prototype beam dump has been manufactured and installed and it is being tested under actual operating conditions.
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