yannick geerebaert llr ecole polytechnique cnrs in2p3 palaiseau france ingrid meeting / march 2008 /...

Yannick Geerebaert LLR Ecole Polytechnique CNRS IN2P3 Palaiseau France INGRID Meeting / March 2008 / France

March 2008 status

MPPC TEST BENCH @ LLRMPPC TEST BENCH @ LLR

S. CholletA. DebraineY. GeerebaertL. GuevaraF. MoreauJ-C. Vanel

Yannick Geerebaert LLR Ecole polytechnique CNRS IN2P3 Palaiseau France INGRID Meeting / March 2008 / France

MPMPPPC : Multi-Pixel C : Multi-Pixel PhotonPhoton Counter Counter

What do we have to measure ?– Reverse current vs Vop & T° (Vbr+ΔV)– Gain vs Vop & T° – Dark Noise Rate vs Vop & T° – Photo detection efficiency P.D.E.

(relative to PMT)

Where do we find those information with new packaging ?


TestTest benchbench Setup Setup

Setup for calibration (orange) and MPPC Parameters measurement (Blue)

20 dB

Attenuator0 to 12 dB

Attenuator

CalibrationPulsegenerator

Voltage

Amplifier

Gain 38.5 dB

BW 1 GHz

C 68.4 pF

LEDPulsegenerator

MPPC

Oscilloscope1 GHz, 10 Gs/s

Trigger(or trigger on signal it-self)

10 KΩ

Vpol

100 nF

BLUE LED

OPTICAL FIBERS

PM TubeHigh Voltage

Dark box

Ambienttemperaturemeasurement

Data from Source Meter : Ireverse=f(Vop)

Data from oscilloscope : GAIN : Histograms of integrated

pulses (in the dark, with few photoelectrons & calibration)

DNR : V=f(t) during 2 ms.(1ns/sample)

PDE relative to PMTTrigger on:

pulse in the darkLED pulse generatorCalibration pulse generatorI=f(V)

GPIB

Source meter


Automatic reverse current measurement Automatic reverse current measurement I=f(VI=f(Vopop))

Data from Source Meter : Ireverse=f(Vop)

Determine normal/geiger mode limit:

Define a Vop range for next measures

Measure leakage current in normal mode


MPPC Gain measurementMPPC Gain measurement

Gain = Qin/1.6 10-19

Correspond to 1 photoelectron peak

Qin = <[email protected].> V.ns / Calibration

V.ns/e-

Measured Gain = 7.67E+05 To be compared with value on

MPPC bag M=7.50E+05


MPPC dark noise rate (DNR) measurementMPPC dark noise rate (DNR) measurement

From V=f(t) records, counting the number of pulses above a given threshold

A view of stacked pulses

Threshold (mV)

Cou

nti

ng

rate

(kH

z)

DNR 350 KHz (value on MPPC Bag : 378 kHz)

Optical Crosstalk : 25 kHz(value on MPPC Bag : 25 kHz)

Nu

mb

er o

f Pu

lses in

1 re

cord

(2m

s)


LLR MPPC Test bench LLR MPPC Test bench

What have changed since November 2007 ? PDE measurement Measurements @ LAL Validation for different parts of final test bench

Measurements with LAL Readout ASIC FPGA evaluation board Communication with PC for automation Light distribution design

Design of final test bench setup Actual design

What is done To-do list


Trigger

PDE Measurement (relative to PMT)PDE Measurement (relative to PMT)

Setup for Photo detection efficiency measurement

Voltage

Amplifier

Gain 38.5 dB

BW 1 GHz

LEDPulsegenerator

MPPC

Oscilloscope500 MHz, 5 Gs/s

100 KΩ

Vpol

100 nF

BLUE LED

OPTICAL FIBERS

PM TubeHigh Voltage

Dark box


Data from oscilloscope : PDE : MPPC integrated pulse

divided by PMT integrated pulse

Trigger on:LED pulse generator

I=f(V)

GPIB

Source meter


Measurements @ LALMeasurements @ LAL

To crosscheck with our data, measurements for 3 MPPC (2x 100pix & 1x 400pix) have been done by LAL instrumentation group (N. Dinu).


LLR MPPC Test bench LLR MPPC Test bench

What have changed since November 2007 ? PDE measurement Measurements @ LAL Validation for different parts of final test bench

Measurements with LAL Readout ASIC FPGA evaluation board Communication with PC for automation Light distribution design

Design of final test bench setup Actual design

What is done To-do list


Setup for MPPC gain measurement

LEDPulsegenerator

MPPC

Oscilloscope1 GHz, 10 Gs/s

Trigger

10 KΩ

Vpol

100 nF

BLUE LED

Dark box


Source meter

LAL

ASIC

100 nF

50 Ω

Test of Sipm readout ASIC from LALTest of Sipm readout ASIC from LAL


Test of Sipm readout ASIC from LALTest of Sipm readout ASIC from LAL

Evaluation of Sipm readout chip from LAL with a 400 pixels MPPC.

MPPC is inthe dark box

LAL Sipm ASICevaluation board

Power supply

FPGA forASIC control

T° measurement

Oscilloscope

SourceMeter LED pulse generator


Test of communication between FPGA, PC Test of communication between FPGA, PC and ASICand ASIC

We will use a simple FPGA evaluation board to control ASIC, interface with instruments and communicate with PC.

Slow controlCommunicationwith PC (RS232)

ASIC controlSelect channel, gain, shaper, etc…

Interface with instrumentstrigger, trigger enable, etc…


Design of light distributionDesign of light distribution

One LED to 36 MPPC with 36 fibers

Same length, same path for each fiber

Same light intensity at the beginning

of each fiber

2 light diffusion layers

Noise events/total number of events


MPPC Test benchMPPC Test bench

Fudji PXR4

GP

IB

Lecroy 104MXi

PyMySQLTest BenchApplication

RS

485 Eth

. 1

Eth. 2

RS232Source Meter

Keithley 2700T° M

onitor

Agilent 33250Pulse Generator

GUI Device LOG INGRID DB Web Browser

FPGA Eval. board


Design of final test benchDesign of final test bench

General view of final test bench


Mechanical view of MPPC Test benchMechanical view of MPPC Test bench

Front-end electronic

MPPCs

T° sensors

Fibers

Light diffusion

layers

Blue LEDA. Cauchois

A. Bonnemaison


““Support_MPPC” boardSupport_MPPC” board Design of board

“support_MPPC” (6 PCBs are foreseen for 4 April).

2 layers, minimal gap : 150 µm Thickness : 3.2 mm 50 Ω coplanar waveguide

design for MPPC signals

Mechanical accuracy of+/- 0.05 mm all over the

board Will hold 72 HOLTITE socket


To-do listTo-do list

Design of SAKE board (Sipm Analyzer for a Kamiokande Experiment)

– Mother board (support MPPC is daughter board)– 2 Sipm ASICs

– 36 relays to switch on/off HV for I reverse measurement

– Interface with FPGA board– foreseen to be at LLR in May

Debug hardware electronic

Writing VHDL code for the automation of the test bench

Finalize the mechanical design, machining all parts of the

test bench

Calibration of entire system

MPPC production test

yannick geerebaert llr ecole polytechnique cnrs in2p3 palaiseau france ingrid meeting / march 2008 /...

Documents

france llr mppc test

mppc bag

france test bench setup

status mppc test bench

ms slide

vanel slide

pde measurement measurements

measured gain