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Overview
Synchrotron radiation (SR) based beam diagnostics is used for the measurement of beam parameters in most of the light sources. It provides online information of various beam parameters without any perturbations to the beam. We have designed, developed and commissioned x-ray diagnostic beam line (X-DBL) at the Indus-2. It is based on the pinhole array imaging (8-18 keV) to measure transverse beam parameters such as beam size, beam divergence, beam emittance, beam instability etc. Its remote operation control and results of online measured data are available in the Indus control room. The knowledge of these parameters helps in stable and smooth operation of the Indus-2 SRS. It helps in exploring various transverse instabilities present at different operating conditions of machine.
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Schematics of the pinhole array based beam diagnostics employed in X-DBL. |
Beamline specifications
Parameter |
Specification |
Source point |
10° port of DP-10 |
Source to pinhole array distance ( m) |
8 |
Pinhole to Phosphor screen distance (m) |
9.8 |
Pinhole diameter (μm) |
20 |
Pinhole array H X V |
17 X 21 |
Effective size (mm2) |
16 X 20 |
Pitch (H & V) (μm) |
1000 |
Thickness (μm) |
250 |
Pinhole array material |
Tungsten |
Linear stroke (mm) |
±10 |
Linear resolution (μm) |
< 10 |
Positioning accuracy (μm) |
< 30 |
Metal filters |
Mo + Al |
Schematic layout of beam line (BL-24) at Indus-2
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Schematic layout of beam line (BL-24) at Indus-2 |
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Photograph of the pinhole array image captured on P-43 phosphor screen and measured intensity profile across column-A in the pinhole array image. |
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Snapshot of GUI (in the control room) for online measurment of beam size, beam position and beam emittance. |
Publications
Journal Articles
- Garg Akash Deep, Karnewar A. K., Ojha A., Shrivastava B.B., Holikatti A. C., Puntambekar T. A., and Navathe C. P.,
‘Design of x-ray diagnostic beam line for a synchrotron radiation source and measurement results’,
Nuclear Instruments and Methods in Physics Research A 754 (2014) 15–23
Conference Papers
- Ojha A., Garg Akash Deep, Karnewar A. K., Holikatti A. C., Shrivastava B.B., Puntambekar T. A., and Navathe C. P.,
‘Development of LabView based image processing algorithm for online measurement of beam parameters at X-ray diagnostic beam line of Indus-2’,
Indian Particle Accelerator Conference (InPAC-2013), VECC, Kolkata, Nov. 19-22, 2013
- Garg Akash Deep, Karnewar A.K., Joshi D.K., Puntambekar T.A.,
“Design of X-ray Diagnostic Beamline for Indus-2 Storage Ring”
Indian Particle Accelerator Conference (InPAC-2011), IUAC, New-Delhi, 15-18 Feb., 2011
Contact Number : 244 2524/ 2442551
Contacts
Sh. T.A. Puntambekar, (+91 731-2442551)
(tushar(at)rrcat.gov.in)
Head, Beam Diagnostics Section,
RRCAT, Indore (M.P.) 452013
Photo gallery
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X-ray Diagnostic Beamline, Indus-2 |
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A view of beamline showing critical beamline components from the front end side |
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A view of filters and phosphor screen assembly installed in the hutch of X-DBL |
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