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TBL BPMs: electronics

Collaborative project undertaken at CERN in 2007 to design analog front-end electronics for 16 BPMs at the TBL. The project involves modifications to amplifier bandwidth and dimensions to meet radiation requirements. Prototypes have been successfully tested, with ongoing development for wider applications.

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TBL BPMs: electronics

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  1. TBL BPMs: electronics Antoni Gelonch, Yuri Kubyshin, Xavier Millán, Gabriel Montoro In collaboration with Ángeles Faus-Golfe, Pablo Modesto CTF3 Collaboration Meeting CERN, January 16-17, 2007

  2. BPMs at the TBL ♦ 16 BPMs are planned to be installed at the TBL TBL BPMs: electronics

  3. Analog front-end electronics Inductive pick-up H ∆H ∆V V ∑ • Amplifier • Mechanics • IPU electronics TBL BPMs: electronics

  4. General scheme of the analog head electronics Digital (front-end) block Design by M. Gasior TBL BPMs: electronics

  5. Hans Braun, 24.11.2004 Typical radiation levels <1000 Gray/year • The BPM design for the DBL by M. Gasior cannot be applied directly. • Modifications required: • The dimensions of the BPM (IPU) must be reduced (by a factor of • 0.6 approximately) • b) The amplifier bandwidth should be broaden up to 200 MHz and • attenuator should be added. TBL BPMs: electronics

  6. Work done (I) a) Amplifierdesign A: schematics, PCB and tests of the 1 channel ● Based on a previous design using AD8370. ●Necessary modifications to meet the requirements to the TBL BPMs have been done. ● The IC is not certified to sustain the existing radiation level. b) IPUelectronics: design and schematics TBL BPMs: electronics

  7. Work done (II) c) Amplifierdesign B: PCB routing is in progress (to be finished in 2 weeks). The design accomplishes the following characteristics: • 10 kHz -200 MHz bandwidth (to be tested in the lab) • Selectable gain (2 gains) • 3 outputs: ΔH, ΔV and Σ • ± 2 V output level • Differential or unipolar outputs ??? (TBD) • The amplifier can be used as a analog front-end • A new feature: the designed amplifier is able to endure 100 Krads (certified by the IC manufacturer) TBL BPMs: electronics

  8. Current status • A one-channel prototype has been designed (Design A), built and tested. Required characteristics has been achieved (digitally variable gain and bandwidth up to 750 MHz). • A design of a radiation tolerant version of the amplifier (Design B) has been worked out. • A design of the IPU electronics has been done. The project is carried out with a financial support of the Spanish Ministry of Education and Science. TBL BPMs: electronics

  9. Schedule January-February March-April April-May ● Build the full version of the amplifier ● Carry out tests of IPU + amplifier - local test - at CERN test bench (?) Many thanks to Louis Bellier, Hans Braun, Steffen Doebert, Domènec Espriu, Marek Gasior, Gunther Geschonke, Lars Soby TBL BPMs: electronics

  10. IPU Electronics

  11. IPU Electronics: schematic TBL BPMs: electronics

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  15. Amplifier Electronics

  16. Prototype A: 1 channel Based on a previous design using AD8370. TBL BPMs: electronics

  17. Prototype A: 1 channel • The design has been successfully tested for another application and has shown a good performance. • Necessary modifications to meet the requirements to the TBL BPMs have been done. PCB plot TBL BPMs: electronics

  18. Prototype A: 1 channel Can it endure 100 Krads? …. We need to test it !!!! TBL BPMs: electronics

  19. Prototype B: 3 channels full schematic TBL BPMs: electronics

  20. Prototype B: main components • Wide-band amplifier IC: THS4508 • Positive voltage regulator: RHFL4913 • Negative voltage regulator: RHFL7913A ■ All of them sustain 100 Krads according to the manufacturers Note: the full schematic will be available from Gabriel Montoro montoro@tsc.upc.edu or as a pdf document on the meeting website TBL BPMs: electronics

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  25. We are interested to have a feedback from experts and to cooperate with other groups • to validate the developed design B • to test the AD8370 IC (design A) under radiation (?) • to choose the proper type of: case, connectors and interface (standardization!!!), so that our front-end amplifier can be connected to the digitizer developed by another groups • TBD: differential or unipolar outputs TBL BPMs: electronics

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