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VFE electronics for SiPM Dubna 29.01.2004 - PowerPoint PPT Presentation


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VFE electronics for SiPM Dubna 29.01.2004. Valery Jejer Viatcheslav Slepnev Igor Tyapkin Sergei Basylev. LAL chip. Version #1 (modified) – 12mv/fQ Input capacitor reduced to 1pF Dynamic range 100mv (input signal) We need factor 10. Version #2 of LAL chip may work.

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slide1

VFE electronics for SiPM

Dubna

29.01.2004

Valery Jejer

Viatcheslav Slepnev

Igor Tyapkin

Sergei Basylev

slide2

LAL chip

  • Version #1 (modified) – 12mv/fQ
  • Input capacitor reduced to 1pF
  • Dynamic range 100mv (input signal)
  • We need factor 10.
  • Version #2 of LAL chip may work.
  • To test it we will need new PCB!?
slide3

Direct digitization

-E

10 kOhm

FPGA

SiPM

ADC

100 MHz

10 bit

Amp.

Data

470 Ohm

51 Ohm

slide4

2-3 PE

Kamp.=10

E=38.8 v

slide5

5 PE

241,7

13,9

slide6

20 PE

360,8

21,7

Self trigger -180

Integral over 50 nsec

slide8

~9ch/PE

2-3 PE

No light

Vsipm=0

Self trigger

slide9

~5 PE

Kamp.=1

slide10

~20 PE

Kamp.=1

slide12

0 pe 7 pe 20 pe 50 pe

0 pe 154,4 1,1

7 pe 159,1 1,2 25%

20 pe 170,2 1,7 7,5%

50 pe 188,7 2.5 7,3%

slide14

0 154,2 0,7

10 pe 161,3 0,8 11,3%

40 pe 170,9 1,2 7,1%

80pe 187,2 1,7 5,1%

slide16

0 154,6 0,9

10 pe 166,7 1,6 13%

40 pe 184,2 2,2 7,4%

80pe 213,1 2,4 4,1%

0 153,3 0,8

10 pe 164,3 1,7 15%

40 pe 180,2 2,4 9,3%

80pe 212,1 2,5 4,2%

slide17

FPGA

ADC

100 MHz

10 bit

Amp.

Direct digitization

100 MHz, 10 bit 2 6 2 10

50 MHz, 8 bit 2 3 1,5 6,5

50 MHz, 8 bit 3 1,5 4,5

slide18

Semi DHCAL

80 pe

10 pe

slide20

Measurement of a pulse duration

-E

10 kOhm

FPGA

SiPM

Amp.

Data

470 Ohm

51 Ohm

slide22

40

10