Electronics for first beam tests of diamond sensors
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Electronics for first beam tests of diamond sensors. Presented by: Igor Emeliantchik. Current Status of Diamond Sensors Research. Laboratory tests with 90 Sr: Charge collection efficiency of 20%. Next step: first prototype for beam tests. Beam tests planned: PITZ ate first, then

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Electronics for first beam tests of diamond sensors

Electronics for first beam tests of diamond sensors

Presented by: Igor Emeliantchik


Current status of diamond sensors research

Current Status of Diamond Sensors Research

Laboratory tests with 90Sr:

Charge collection efficiency of 20%

Next step:

first prototype for beam tests

Beam tests planned:

PITZ ate first,

then

CERN, HERA, TTF2

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


What should we expect at pitz

What should we expect at PITZ?

5MeV

Typical spectrum of x-ray tube.

Something similar can be expected

at sensor location

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Diamond sensor and g quanta

Diamond Sensor and g-quanta

Probability of photon interaction within

300 mm of diamond sensor

Calculations are based on data compiled by W. H.McMaster et. al. Compilation of X-ray Cross-Sections, National Bureau of Standards, for calculation of x-ray cross sections,

http://www.csrri.iit.edu/periodic-table.html

Photons with energies of several keV are expected

to give main contribution.

13 eV are needed for 1 e-hole production.

Thus 1 photon will give about 100e.

So, if PITZ halo contains a dozen or more photons

with energy of several keV per bunch, we have

a chance to register it with our diamond sensor

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Time structure of the beam at pitz

Time Structure of the Beam at PITZ

So, we need fast electronics, able to operate

at 100ns bunch rate with minimum noise

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Readout electronics for beam tests of diamond sensors

Metallized plastic box

Rfb

Cfb

Diamond

CSP

“Tetrod”

OpAmp

AD829

Output

Ccal

50

Test

Readout Electronics for Beam Tests of Diamond Sensors

Charge-sensitive preamplifier “Tetrod” is a low-noise

one-channel monolythic IC, developed at NC PHEP

(Minsk), and produced by microelectronics plant

“Integral” (Minsk)

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Two types of tetrod preamplifier ic

Two Types of “Tetrod” Preamplifier IC

Tetrod-JFET

preamplifier

Tetrod-BJT

preamplifier

Tetrod preamplifiers

were designed for

calorimetric applications,

so they have big dynamic range,

at least 13 bits

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Tetrod bjt amplifier

Tetrod-BJT amplifier

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Oscillograms of tetrod bjt amplifier

Oscillograms of Tetrod-BJT Amplifier

Preamp output

20ns/div

Shaper output

20ns/div

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Performance of tetrod bjt amplifier

Performance of Tetrod-BJT Amplifier

Noise

Linearity

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Performance of tetrod jfet amplifier

Performance of Tetrod-jFET amplifier

Noise

Linearity

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


Conclusions

Conclusions

Two amplifiers, Tetrod-BJT and Tetrod-jFET are

designed, produced, and tested.

Tetrod-jFET has slightly better noise performance.

Tetrod-BJT is faster

Both amplifiers seem to be suitable for beam tests

Instrumentation of the Forward Region for a Linear Collider Detector Prague, April 15 - 17, 2004


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