| Paper | Title | Page |
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| WEPMA002 | A Large Area Scanning Magnet For Homogeneous Irradiation of Targets | 339 |
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| The scanner is an important tool for accelerator based material science research. For high energy (~100 MeV) ion beam scanner has to be magnetic one. Major problem faced with magnetic scanner is its high inductance which causes large impedance to the a.c. power supply used to energise the magnet. We have designed a magnetic scanner keeping attention to minimise its inductance. The scanner is composed of two independent H-type dipole magnets which are fed by saw tooth pulses. It can scan over an area of 25 mm x 25mm at a distance of 1 metre. The power supplies for this scanner have also been designed. These are bipolar, wideband, high speed amplifirs that can reproduce complex waveform without any distotion. The ratings are 60V, 50A operating at 50Hz for x-scanner and 5V,70A at 0.2Hz for y-scanner. Design and performance of the scanner magnet and power supplies will be presented. | ||
| WEPMA078 | HTS-ECRIS and Low Energy Beam Transport System of the High Current Injector | 434 |
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| A high performance electron cyclotron resonance ion source (ECRIS) called PKDELIS capable of operation at 14.5 and 18 GHz and which uses High Temperature Superconducting (HTS) coils designed jointly by IUAC, Delhi (earlier called NSC), Pantechnik, Caen and ISN, Grenoble is presently in operation. The source is very suitable for operation on a 400 kV high voltage platform for injecting beams from the High Current Injector (HCI) into the Superconducting Linear Accelerator Booster. In the low energy beam transport (LEBT) system of the HCI, the beam extraction and transport becomes more and more challenging. In order to avoid the losses of the beam, the complete transport system is being made as short as possible. In addition, due to the high currents (~10 mA) extracted, the extraction system needs proper cooling requirements and possibility of movement of the electrodes for tuning various A/q beams. Typical axial and radial bremstraahlung spectra have been measured from the ECR plasma. Details will be discussed and further measurements are being explored to obtain a better understanding. | ||
| THPMA089 | Studies of Metallic Ion Beams using ECRIS | 770 |
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Low energy metallic ion beams find wide applications in various research fields especially in materials science, atomic and molecular physics. Several metallic ion beams have been developed successfully using all permanent magnet 10 GHz electron cyclotron resonance (ECR) ion source based low energy ion beam facility (LEIBF) [*] at IUAC. The most important feature of the facility is that the source and all its peripheral components including electronics and vacuum systems are on a high voltage platform (300 kV).The metallic ion beams were developed by different methods e.g. oven, sputtering, insertion and metal ions using volatile compounds (MIVOC). The ion source has been tuned to get optimum intensities of metallic ion beams. The high intensities of low charge state metallic ion beams are suitable to engineer the materials for optical, electrical and structural properties via ion implantation. For the interest of atomic and molecular physics, the high intensities of highly charged metallic ion beams are produced using gas mixing [**] and bias techniques. The charge state distribution studies of various metallic ion beams and gas mixing effect of different gases are presented.
[*] P. Kumar et.al., Nucl. Instr. and Meth. B, 440 (2006) 246.[**] A. G. Drentje et.al., Rev. Sci. Instrum. 953 (1996) 67. |