TBL BPMs: electronics Antoni Gelonch, Yuri Kubyshin, Xavier Millán, Gabriel Montoro CTF3 Collaboration MeetingCERN, January 16-17, 2007 In collaboration

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

TBL BPMs: electronics

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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.



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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

mailto:[email protected]


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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

Documents

TBL BPMs: electronics Antoni Gelonch, Yuri Kubyshin, Xavier Millán, Gabriel Montoro CTF3 Collaboration MeetingCERN, January 16-17, 2007 In collaboration