Readout electronics development for CDC in COMET Phase-I Nakazawa - - PowerPoint PPT Presentation

▶
readout electronics development for cdc in comet phase i
SMART_READER_LITE
LIVE PREVIEW

Readout electronics development for CDC in COMET Phase-I Nakazawa - - PowerPoint PPT Presentation

Sep 23, 2022 510 likes •789 views

Readout electronics development for CDC in COMET Phase-I Nakazawa Yu Kuno-g 2015.12.25 Year-end joint session 2015 1 Outline 2 Strategy Result Radiation setup Motivation Readout board (RECBE) Cylindrical Drift

slide-1
SLIDE 1

Readout electronics development for CDC in COMET Phase-I

Nakazawa Yu Kuno-g 2015.12.25

Year-end joint session 2015

1

slide-2
SLIDE 2

Outline

  • Introduction
  • COMET Phase-I
  • Cylindrical Drift Chamber (CDC)
  • Readout board (RECBE)
  • Neutron irradiation test @Kobe Univ.
  • Motivation
  • Radiation setup
  • Result
  • Issue
  • Strategy
  • Summary

2

Year-end joint session 2015

slide-3
SLIDE 3

Introduction

3

Year-end joint session 2015

slide-4
SLIDE 4

COMET Phase-I

Purpose : Search for the charged Lepton Flavor Violation

  • The neutrinoless, coherent transition of muon to electron @J-PARC in 2018
  • B.R.(µ -> eγ) ~ O(10
  • 54 ) @SM extended neutrino oscillation
  • S.E.S. ~ 3 × 10
  • 15 in the COMET Phase-I

Detector : Cylindrical Drift Chamber (CDC) & Straw Tube Tracker Signal : ~105 MeV/c mono-energetic electron for an aluminum target Background : Decay-In-Orbit electron & Beam related BG

4

Year-end joint session 2015

slide-5
SLIDE 5

CDC

  • A. Wire
  • Sense : ø25 um W plated Au
  • Field : ø126 um Al
  • B. Gas : Helium base (not yet decided)
  • C. Momentum resolution : 200 keV/c
  • D. Readout System : 104 RECBE boards
  • Mass-production was completed

at IHEP in China

Signal DIO

Momentum Spectrum expected in the Phase-I

Muonic Atom

  • Unstable atom capturing a muon in

electron orbit.

  • Decay In Orbit (DIO) : µ -> eνµνe
  • > Background

Cylindrical Drift Chamber

5

Year-end joint session 2015

slide-6
SLIDE 6

Readout Board

8ch/chip 8ch/chip

Remodel the RECBE developed for Belle-II 1. Aurora：remove 2. Rewrite the firmware 3. System Clock：128MHz → 120MHz

6

Year-end joint session 2015

Development items

  • 1. Data reduction
  • Throw away the BG data
  • 2. Irradiation tolerance
  • gamma ray
  • neutron

Evaluation items

  • 1. Noise level
  • 2. Gain linearity (Analog out of ASD)
  • 3. Threshold scan (Digital out of ASD)
  • 4. Time resolution
  • 5. Cross talk
  • 6. TRG rate tolerance
  • 7. Temperature vs Power

This talk

Virtex-5 XC5VLX155T

slide-7
SLIDE 7

Neutron irradiation test

@Kobe Univ.

7

Year-end joint session 2015

slide-8
SLIDE 8

htemp Entries 24524 Mean 15.12 RMS 23.22

EvtP4[3] 50 100 150 200 250 300 350 400 1 10

2

10

3

10

4

10

htemp Entries 24524 Mean 15.12 RMS 23.22

EvtP4[3]

Motivation

  • Virtex-5 is exposed to a high neutron flux of >1012

neutrons/cm2. (ref. Ye-san’s simulation：28aSN-2)

  • RECBEs are set at the CDC endplate at the

downstream side.

  • It is known that a firmware is broken by neutrons. So

we need re-download the one at intervals.

  • Single Event Upset：SEU

We want to check whether this problem of SEU is serious or not.

RECBE

  • As a result of nuclear reaction with a neutron

and semiconductor atom, a charged particle

  • r an ion is generated.
  • These charged particle create electron-hole

pairs with drifting.

  • These charge invert logic in the FPGA

What is SEU?

Problem in the COMET Phase-I

Energy spectrum of neutrons

MeV

beam

8

Year-end joint session 2015

slide-9
SLIDE 9

評価項目

  • 1. Frequency of SEU occurrence
  • Download the firmware with the iMPACT（Xilinx Inc.）and a JTAG cable.
  • Compare a bit stream on the FPGA to a original firmware with using the function
  • f “Verify” in the iMPACT.
  • Due to the comparison, count the number of SEUs.
  • 2. A neutron incident angle effect on SEU rate. (θ=0º and 180º)

Radiation setup

Beam : ~3 MeV Deuteron Target : Be Intensity : (1.90 ± 0.13) × 10

6 neutrons/cm 2

( Distance from target : 10 cm ) ( Beam current : 1 microC/s )

TANDEM @Kobe Univ.

Definition of angle

ref : http://iopscience.iop.org/article/10.1088/1748-0221/7/02/C02022/pdf

Neutron Energy Spectrum at TANDEM

ref：Neutrons from Thick Target Beryllium Reactions at 1.0 MeV to 3.0 MeV (Tetsuo INADA, 1968)

~2 MeV

En [MeV]

Evaluation items

TANDEM

中性子ビームライン

9

Year-end joint session 2015

  • ref. Nakanishi Hitoshi

(Univ. of Tokyo) JPS 2015 autumn

slide-10
SLIDE 10

Setup

Neutron RECBE

(Radially from target) Be Target Deuteron

(✳) In this test, we assumed the uniform beam at Virtex-5

10

Year-end joint session 2015

slide-11
SLIDE 11

Date and Time 07.28 09:00 07.28 21:00 07.29 09:00 07.29 21:00 07.30 09:00 07.30 21:00 07.31 09:00 07.31 21:00 08.01 09:00 08.01 21:00 08.02 09:00 08.02 21:00 Neutrons / SEU 100 150 200 250 300 350

6

10 ×

Rate

Neutrons/SEU Date and Time

Neutrons/SEU

(✳) Divide a long run into every ~2000sec during measurement.

Run1 Start 7/28 8:20 Stop 8/2 10:30 Total time 211621 sec Distance 285 mm Angle 180 º Neutrons 9.25×1011 SEUs 4934

(1.82 ± 0.03) × 108

Rate-1 (neutrons/SEU/Virtex-5) (✳) Error is statistical error given by the standard deviation. (✳) Rate is estimated by fitting this graph.

Result : SEU rate at 180º

11

slide-12
SLIDE 12

Date and Time 08.03 21:00 08.04 03:00 08.04 09:00 08.04 15:00 08.04 21:00 08.05 03:00 08.05 09:00 08.05 15:00 08.05 21:00 08.06 03:00 Neutrons / SEU 200 400 600 800 1000 1200 1400 1600

6

10 ×

Rate

Run3 Run4 Run5 Start 8/3 23:38 8/5 1:46 8/6 1:23 Stop 8/4 8:31 8/5 9:34 8/6 9:13

Total Time 29933 sec 27020 sec 11438 sec

Direction 275 mm 285 mm 285 mm Angle 0 º 0 º 0 º Neutrons 2.22×1010 5.25×1010 7.65×109 SEUs 59 129 23

(3.16 ± 0.23) × 108

Rate-1 (neutrons/SEU/Virtex-5) (✳) Error is statistical error given by the standard deviation. (✳) Rate is estimated by fitting this graph.

Neutrons/SEU Date and Time

Neutrons/SEU

(✳) Divide three runs into every ~2000sec during measurement.

Result : SEU rate at 0º

17th COMET Collaboration Meeting (LPNHE Paris)

12

Year-end joint session 2015

slide-13
SLIDE 13

Issue

13

Year-end joint session 2015

slide-14
SLIDE 14

Issue

  • ref. Abe Shinichiro (Kyushu Univ.)

61st JSAP meeting

Estimated SEU rate-1 (sec/SEU/104boards) by the SEU cross section and the neutron energy spectrum in the COMET Phase-I.

0.84 sec/SEU/104boards (θ=180º)

A serious problem that reliability of data from RECBEs is lost every 0.84 sec

14

Year-end joint session 2015 from Y. Yang (Kyushu Univ.)

Neutron Flux at RECBEs

slide-15
SLIDE 15

Strategy

  • A. Add the self-repairing function in the firmware.

Detect SEU and correct it. Can’t correct multi SEUs occurred at the same time. (Multi-Bit Upsets : MBU) Simulation of this function and performance test of new firmware were done. The next neutron irradiation test is planed

  • TANDEM in Kobe Univ. on January 12th - 14th.
  • Check the performance of this function.
  • Measurement of MBU rate.

(It is expected that MBU rate is about 1/500 of SEU rate.)

  • B. Add extra shielding against neutrons for the FPGA.

Not fixed yet

15

Year-end joint session 2015

  • ref. other experiments
slide-16
SLIDE 16

Summary

16

Year-end joint session 2015

slide-17
SLIDE 17

Summary

  • A. COMET Phase-I
  • Search for the neutrinoless, coherent transition of muon to electron

@J-PARC in 2018

  • S.E.S ~ 3 × 10
  • 15
  • B. Neutron irradiation test @TANDEM (Kobe Univ.)
  • The number of SEUs with θ=180º is about 1.7 times larger than

θ=0º.

  • SEU rate
  • 1 : 0.84 [sec/SEU/104boards] (θ=180º)
  • Added the self-repairing function in the firmware.
  • C. To-do
  • The second neutron irradiation test at TANDEM (Kobe Univ.) on

January 12th - 14th

  • 1. Performance test of the self-repairing function.
  • 2. Measurement of MBU rate

17

Year-end joint session 2015

slide-18
SLIDE 18

18

Year-end joint session 2015

slide-19
SLIDE 19

Backup

19

Year-end joint session 2015

slide-20
SLIDE 20

Readout Board

FPGA

  • Virtex-5 (XC5VLX155T)
  • For COMET CDC, rewrite the firmware

for Belle SFP slot

  • Optical Fiber
  • SiTCP
  • Send hit information. (ADC, TDC, etc.)

JTAG

  • RJ-45
  • For downloading the firmware

LVDS

  • RJ-45
  • Input ：Clock、TRG
  • Output：Busy

8ch/chip 8ch/chip

Remodel the RECBE developed for Belle-II

  • Aurora：remove
  • Rewrite the firmware
  • System Clock：128MHz → 120MHz

Mass-production of RECBEs was completed at IHEP in China

  • 104 boards：for CDC
  • 24 boards：for spare
  • Performance test @IHEP

20

Year-end joint session 2015

slide-21
SLIDE 21

F.G. LV Power Supply

RECBE

Clock Generator G.G. Downloader PC (VAIO) Optical Media Convertor PC HUB

JTAG ~5m LV Cable ~5m Optical Fiber ~?m LAN LAN USB LEMO LEMO LEMO

Beam area Beam safe area

TRG CLK TEST IN Delay : 500 ns

Setup

21

Year-end joint session 2015

slide-22
SLIDE 22

Neutron Flux @TANDEM

22

Year-end joint session 2015

  • ref. Hitoshi Nakanishi (Univ. of Tokyo), JPS 2015 autumn
slide-23
SLIDE 23

Neutron Flux @TANDEM

23

Year-end joint session 2015

  • ref. Hitoshi Nakanishi (Univ. of Tokyo), JPS 2015 autumn
slide-24
SLIDE 24

Neutron Flux @TANDEM

24

Year-end joint session 2015

  • ref. Hitoshi Nakanishi (Univ. of Tokyo), JPS 2015 autumn
slide-25
SLIDE 25

Neutron Flux @TANDEM

25

Year-end joint session 2015

  • ref. Hitoshi Nakanishi (Univ. of Tokyo), JPS 2015 autumn
slide-26
SLIDE 26

Issue

Angle 20 40 60 80 100 120 140 160 180 Rate Inverse [n/SEU/Virtex-5] 180 200 220 240 260 280 300 320 340

6

10 ×

Rate Inverse

Angular dependence

Rate0 Rate180 = 3.16 × 108 1.82 × 108 ∼ 1.74 ± 0.13

SEU rate dependents on a incident angle of neutrons. What is thought to be the factor

  • Structure of the RECBE
  • Component of the FPGA and the PCB
  • etc. . .

This topic is presently under investigation

26

Year-end joint session 2015

slide-27
SLIDE 27

Geometry of Detector Section

27

Year-end joint session 2015

from Y. Yang (Kyushu Univ.)