TBL BPMs: electronics Antoni Gelonch, Yuri Kubyshin, Xavier Millán, Gabriel Montoro CTF3...
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Transcript of TBL BPMs: electronics Antoni Gelonch, Yuri Kubyshin, Xavier Millán, Gabriel Montoro CTF3...
TBL BPMs: electronicsTBL BPMs: electronics
Antoni Gelonch, Yuri Kubyshin, Xavier Millán, Gabriel Montoro
CTF3 Collaboration Meeting CERN, January 16-17, 2007
In collaboration with Ángeles Faus-Golfe, Pablo Modesto
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BPMs at the TBL
♦ 16 BPMs are planned to be installed at the TBL
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H
V
∆H
∆V
∑
Inductive pick-upAnalog front-end electronics
• Mechanics • IPU electronics
•Amplifier
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General scheme of the analog head
electronics
Digital (front-end) block
Design by M. Gasior
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Tentative parameters of the BPMs for the TBL
BPM analog bandwidth (BPM with associated electronics)
10 kHz -100 MHz(200 MHz is highly
desirable)
Beam position range of interest +/-5 mm horizontal and
vertical
Beam aperture diameter 22.5 mm
Overall mechanical length < 100 mm
Number of BPM’s in TBL 18
Resolution at maximum current <5 m
Overall precision <50 m
Hans Braun, 24.11.2004
The BPM design for the DBL by M. Gasior cannot be applied directly. Modifications required: a) 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.
Typical radiation levels <1000 Gray/year
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Work done (I)
a) Amplifier design A: schematics, PCB and tests of the 1 channel
b) IPU electronics: design and schematics
● 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.
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c) Amplifierc) Amplifier design 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)
Work done (II)
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Current status A one-channel prototype has been designed (Design ADesign 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 BDesign 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.
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Schedule
● Build the full version of the amplifier
● Carry out tests of IPU + amplifier - local test - at CERN test bench (?)
January-February
March-AprilApril-May
Many thanks to Louis Bellier, Hans Braun, Steffen Doebert, Domènec Espriu, Marek Gasior, Gunther Geschonke, Lars Soby
IPU Electronics
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IPU Electronics: schematic
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Amplifier Electronics
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Based on a previous design using AD8370.
Prototype A: 1 channel
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PCB plot
• 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.
Prototype A: 1 channel
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Prototype A: 1 channel
Can it endure 100 Krads? …. We need to test it !!!!
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Prototype B: 3 channels full schematic
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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 [email protected] or as a pdf document on the meeting website
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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