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Title: Performance of first high temperature superconducting ECRIS

Abstract

High temperature superconducting (HTS) electron cyclotron resonance ion source called PKDELIS was designed, developed as a collaborative project mainly between Inter University Accelerator Centre (formerly Nuclear Science Centre) and Pantechnik. One of the major criteria of the design was to get a high performance source suitable for cryogen-free operation on a high voltage platform with minimum requirements of electrical power and cooling water. Ion beams having A/q of {approx}7 are required from this source for the high current injector of the superconducting linear accelerator. The HTS coils have been operational since 2003. A 80 mm gap, medium resolution, 'third order' corrected analyzing magnet having a bending radius of 300 mm has been coupled close to the source. The analyzed beam is collected using a high power, water cooled Faraday cup. The design and performance of the source and issues related to the extraction and transport of the beam are discussed in detail.

Authors:
; ; ; ; ; ; ;  [1];  [2];  [2]
  1. Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110067 India (India)
  2. (France)
Publication Date:
OSTI Identifier:
20778957
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 77; Journal Issue: 3; Conference: 11. international conference on ion sources, Caen (France), 12-16 Sep 2005; Other Information: DOI: 10.1063/1.2164887; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CRYOGENIC FLUIDS; DESIGN; ECR ION SOURCES; FARADAY CUPS; HIGH-TC SUPERCONDUCTORS; ION BEAMS; LINEAR ACCELERATORS; PARTICLE BEAMS; PERFORMANCE; SUPERCONDUCTING COILS; SUPERCONDUCTING MAGNETS; WATER

Citation Formats

Kanjilal, D., Rodrigues, G., Kumar, P., Mandal, A., Roy, A., Bieth, C., Kantas, S., Sortais, P., Pantechnik, 12 rue Alfred Kastler, 14000 Caen, and Laboratoire de Physique Subatomique et de Cosmologie, 53 avenue des Martyrs, 38026 Grenoble Cedex. Performance of first high temperature superconducting ECRIS. United States: N. p., 2006. Web. doi:10.1063/1.2164887.
Kanjilal, D., Rodrigues, G., Kumar, P., Mandal, A., Roy, A., Bieth, C., Kantas, S., Sortais, P., Pantechnik, 12 rue Alfred Kastler, 14000 Caen, & Laboratoire de Physique Subatomique et de Cosmologie, 53 avenue des Martyrs, 38026 Grenoble Cedex. Performance of first high temperature superconducting ECRIS. United States. doi:10.1063/1.2164887.
Kanjilal, D., Rodrigues, G., Kumar, P., Mandal, A., Roy, A., Bieth, C., Kantas, S., Sortais, P., Pantechnik, 12 rue Alfred Kastler, 14000 Caen, and Laboratoire de Physique Subatomique et de Cosmologie, 53 avenue des Martyrs, 38026 Grenoble Cedex. Wed . "Performance of first high temperature superconducting ECRIS". United States. doi:10.1063/1.2164887.
@article{osti_20778957,
title = {Performance of first high temperature superconducting ECRIS},
author = {Kanjilal, D. and Rodrigues, G. and Kumar, P. and Mandal, A. and Roy, A. and Bieth, C. and Kantas, S. and Sortais, P. and Pantechnik, 12 rue Alfred Kastler, 14000 Caen and Laboratoire de Physique Subatomique et de Cosmologie, 53 avenue des Martyrs, 38026 Grenoble Cedex},
abstractNote = {High temperature superconducting (HTS) electron cyclotron resonance ion source called PKDELIS was designed, developed as a collaborative project mainly between Inter University Accelerator Centre (formerly Nuclear Science Centre) and Pantechnik. One of the major criteria of the design was to get a high performance source suitable for cryogen-free operation on a high voltage platform with minimum requirements of electrical power and cooling water. Ion beams having A/q of {approx}7 are required from this source for the high current injector of the superconducting linear accelerator. The HTS coils have been operational since 2003. A 80 mm gap, medium resolution, 'third order' corrected analyzing magnet having a bending radius of 300 mm has been coupled close to the source. The analyzed beam is collected using a high power, water cooled Faraday cup. The design and performance of the source and issues related to the extraction and transport of the beam are discussed in detail.},
doi = {10.1063/1.2164887},
journal = {Review of Scientific Instruments},
number = 3,
volume = 77,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}
  • The first High Temperature Superconducting Electron Cyclotron Resonance Ion Source (HTS-ECRIS) called PKDELIS has been developed as a collaborative project. The source has been designed for suitable use on a high voltage platform with minimum requirements of electrical power and water cooling. The design is based on the required A/q of {approx} 7 for the High Current Injector (HCI) of the Superconducting Linear Accelerator (SC-LINAC) at Nuclear Science Centre and to provide relatively higher beam currents of multiply charged ions. High Temperature Superconducting coils (Bi-2223) have been chosen to reduce the power and cooling requirements for obtaining large axial magneticmore » fields corresponding to a frequency of 18 GHz. The HTS coils are operated in a superconducting mode in a temperature range of about 20 to 22 K using Gifford-McMahon type cryo-refrigerators. A 36 element hexapole was designed using NdFeB to obtain higher fields at the chamber wall. The source is tested thoroughly by producing beams of carbon, oxygen, neon, argon, xenon, tantalum and lead at various charge states having analysed current up to 2 mA. The detailed design aspects and test results are presented.« less
  • A novel Mixed Axial and Radial field System (MARS) seeks to enhance the B fields inside the plasma chamber within the limits of a given conductor, thereby making it possible to raise the operating fields for Electron Cyclotron Resonance Ion Sources (ECRISs). The MARS concept consists of a hexagonally shaped closed-loop coil and a set of auxiliary solenoids. The application of MARS will be combined with a hexagonal plasma chamber to maximize the use of the radial fields at the chamber inner surfaces. Calculations using Opera's TOSCA-3D solver have shown that MARS can potentially generate up to 50% higher fieldsmore » and use of only about one half of the same superconducting wire, as compared with existing magnet designs in ECRISs. A MARS magnet system built with Nb 3 Sn coils could generate a high strength minimum-B field of maxima of ≥ 10 T on axis and ~6 T radially in an ECRIS plasma chamber. Following successful development, the MARS magnet system will be the best magnet scheme for the next generation of ECRISs. This paper will present the MARS concept, magnet design, prototyping a copper closed-loop coil, and discussions.« less
  • Two different systems for noise cancellation (first order gradiometers) have been developed using two similar high temperature superconducting quantum interference devices (SQUIDs). {open_quotes}Analog{close_quotes} gradiometry is accomplished in hardware by either (1) subtracting the signals from the sensor and background SQUIDs at a summing amplifier (parallel technique) or (2) converting the inverted background SQUID signal to a magnetic field at the sensor SQUID (series technique). Balance levels (ability to reject a uniform background magnetic field) achieved are 2{times}10{sup 3} and 1{times}10{sup 3} at 20 Hz for the parallel and series methods, respectively. The balance level as a function of frequency ismore » also presented. The effects which time delays (phase differences) in the two sets of SQUID electronics have on these balance levels are presented and discussed. It is shown that these delays, along with geometrical considerations, are the limiting factor for balance level for any electronic gradiometer system using two (or more) SQUIDs, a very different situation from the case with wire-wound gradiometers. Results using a dipole field to study the performance of both the parallel and series devices functioning as gradiometers in an unshielded laboratory are presented and compared with theory. {copyright} {ital 1998 American Institute of Physics.}« less
  • Application of High Temperature Superconductors (HTS) to devices requires a detailed understanding of the effects of temperature, magnetic field and orientation of magnetic field n the critical current density. Measurements of the critical surface of PbBSCCO were made on long lengths of fully reacted multi-filamentary wire would into solenoids. These react and wind coils were tested in magnetic fields to 20 tesla and temperatures from 1.8 K to 77 K. Overall current densities of 200--300 A/mm{sup 2} were achieved at fields of 20 T. The effect of high electromagnetic forces on performance of high temperature superconducting (HTSC) coils is analyzedmore » and compared with analytical models for the HTSC conductor and coil winding.« less
  • Long-length, high-temperature superconducting (HTS) wires capable of carrying high critical current, Ic, are required for a wide range of applications. Here, we report extremely high performance HTS wires based on 5 m thick SmBa2Cu3O7- (SmBCO) single layer films on textured metallic templates. SmBCO layer wires over 20 meters long were deposited by a cost-effective, scalable co-evaporation process using a batch-type drum in a dual chamber. All deposition parameters influencing the composition, phase, and texture of the films were optimized via a unique combinatorial method that is broadly applicable for co-evaporation of other promising complex materials containing several cations. Thick SmBCOmore » layers deposited under optimized conditions exhibit excellent cube-on-cube epitaxy. Such excellent structural epitaxy over the entire thickness results in exceptionally high Ic performance, with average Ic over 1000 A/cm for the entire 22 meter long wire and maximum Ic over 1,500 A/cm for a short 12 cm long tape. The Ic values reported in this work are the highest values ever reported from any lengths of cuprate-based HTS wire or conductor.« less