Characterization of the Strip Front-End ASIC of the PANDA MVD with the JDRS

18.03.2019 | DPG SPRING MEETING, ALESSANDRA LAI

PANDA Experiment

● Cooled p beam @HESR- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy- Exotic states- Nucleon structure- pA collisions

p

Target

Target Spectrometer Forward Spectrometer

1

PANDA Experiment● Cooled antiproton beam @HESR

- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy - Exotic states - Nucleon structure - pA collisions

Target Spectrometer Forward Spectrometer

Target

p

2

PANDA Experiment

● Cooled antiproton beam @HESR- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy - Exotic states - Nucleon structure - pA collisions

➙ Precise event timing➙ Charged particles tracking - primary and displaced vertices

Target

Target Spectrometer Forward Spectrometer

p

3

PANDA Experiment

Micro Vertex Detector

● Cooled antiproton beam @HESR- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy - Exotic states - Nucleon structure - pA collisions

➙ Precise event timing➙ Charged particles tracking - primary and displaced vertices

Target

p

Target Spectrometer Forward Spectrometer

4

PANDA ExperimentMicro Vertex Detector

40 cm

● Spatial resolution < 100 μm● Time resolution < 10 ns● Continuous readout

Si hybrid pixels Si micro strips

● Cooled antiproton beam @HESR- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy - Exotic states - Nucleon structure - pA collisions

➙ Precise event timing➙ Charged particles tracking - primary and displaced vertices

Target

p

Target Spectrometer Forward Spectrometer

5

PANDA ExperimentMicro Vertex Detector

40 cm

Si hybrid pixels Si micro strips

● Cooled antiproton beam @HESR- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy - Exotic states - Nucleon structure - pA collisions

➙ Precise event timing➙ Charged particles tracking - primary and displaced vertices

● Spatial resolution < 100 μm● Time resolution < 10 ns● Continuous readout

Target

p

Target Spectrometer Forward Spectrometer

6

● Custom front-end chips➙ ToPix, PASTA

PANDA ExperimentMicro Vertex Detector

40 cm

Si hybrid pixels Si micro strips

● Cooled antiproton beam @HESR- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy - Exotic states - Nucleon structure - pA collisions

➙ Precise event timing➙ Charged particles tracking - primary and displaced vertices

Versatile data acquisition system for the different front-end prototypes

● Spatial resolution < 100 μm● Time resolution < 10 ns● Continuous readout

Target

p

Target Spectrometer Forward Spectrometer

7

● Custom front-end chips➙ ToPix, PASTA

PANDA ExperimentMicro Vertex Detector

40 cm

Si hybrid pixels Si micro strips

● Cooled antiproton beam @HESR- 1.5 GeV/c < p < 15 GeV/c- Δp/p < 10-4

● Study strong interaction - Multi-s and c hadron spectroscopy - Exotic states - Nucleon structure - pA collisions

➙ Precise event timing➙ Charged particles tracking - primary and displaced vertices

Versatile data acquisition system for the different front-end prototypes

● Spatial resolution < 100 μm● Time resolution < 10 ns● Continuous readout

Target

p

Target Spectrometer Forward Spectrometer

8

● Custom front-end chips➙ ToPix, PASTA

Jülich Digital Readout System

PASTA and JDRS

PASTA● Time-over-threshold: time + charge measurement - low threshold: leading edge time stamp - high threshold: deposited charge

9

Self trigger capability

Number of channels 64

Frequency 160 MHz

Time resolution 6.25 ns

3.4 mm X 4.5 mm

PASTA

sensor

PASTA and JDRS

PASTA● Time-over-threshold: time + charge measurement - low threshold: leading edge time stamp - high threshold: deposited charge

3.4 mm X 4.5 mm

PASTA

sensor

Self trigger capability

Number of channels 64

Frequency 160 MHz

Time resolution 6.25 ns

10

PASTA and JDRS

PASTA● Time-over-threshold: time + charge measurement - low threshold: leading edge time stamp - high threshold: deposited charge

3.4 mm X 4.5 mm

PASTA

sensor

Self trigger capability

Number of channels 64

Frequency 160 MHz

Time resolution 6.25 ns

JDRS

● Data flow- Encoded event data in PASTA- First processing and storing in FPGA register- Transfer to PC and further processing

11

PASTA and JDRS

PASTA● Time-over-threshold: time + charge measurement - low threshold: leading edge time stamp - high threshold: deposited charge

3.4 mm X 4.5 mm

PASTA

sensor

Self trigger capability

Number of channels 64

Frequency 160 MHz

Time resolution 6.25 ns

JDRS

● Data flow- Encoded event data in PASTA- First processing and storing in FPGA register- Transfer to PC and further processing

12

Integration of PASTA in the JDRS

● Former version of JDRS (ToPix) - Lack of modularity and flexibility

13

Integration of PASTA in the JDRS

● Former version of JDRS (ToPix) - Lack of modularity and flexibility

14

Integration of PASTA in the JDRS

● Former version of JDRS (ToPix) - Lack of modularity and flexibility

● Restructuring of the code- Use multiple interconnected modules - Separate reusable modules from ASIC specific connect

to FPGA read

data

display GUI

send data

config ASIC

decode data

15

Integration of PASTA in the JDRS

● Former version of JDRS (ToPix) - Lack of modularity and flexibility

● Restructuring of the code- Use multiple interconnected modules - Separate reusable modules from ASIC specific

● Communication to and from PASTA- Configuration operations- Data collection and processing

config ASIC

connect to FPGA

read data

send data

display GUI

decode data

16

Integration of PASTA in the JDRS

● Former version of JDRS (ToPix) - Lack of modularity and flexibility

● Restructuring of the code- Use multiple interconnected modules - Separate reusable modules from ASIC specific

● Communication to and from PASTA- Configuration operations- Data collection and processing

64 channels

21

para

mete

rs

connect to FPGA

read data

display GUI

send data

config ASIC

decode data

17

Integration of PASTA in the JDRS

● Former version of JDRS (ToPix) - Lack of modularity and flexibility

● Restructuring of the code- Use multiple interconnected modules - Separate reusable modules from ASIC specific

● Communication to and from PASTA- Configuration operations- Data collection and processing

More than 1000 parameters to tune

21

para

mete

rs

connect to FPGA

read data

display GUI

send data

config ASIC

decode data

64 channels

18

Integration of PASTA in the JDRS

● Former version of JDRS (ToPix) - Lack of modularity and flexibility

● Restructuring of the code- Use multiple interconnected modules - Separate reusable modules from ASIC specific

● Communication to and from PASTA- Configuration operations- Data collection and processing

More than 1000 parameters to tune

21

para

mete

rs

Automatic routines

connect to FPGA

read data

display GUI

send data

config ASIC

decode data

64 channels

19

Evaluation of the Performance of PASTA● Internal injection

- Channel response

reduced εin 10% of ch

20

Evaluation of the Performance of PASTA● Internal injection

- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

reduced εin 10% of ch

21

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

pulse amplitude [fC]

tim

e-o

ver-

thre

shold

[ns]

resi

duals

22

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

23

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

24

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

25

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

Non-flat ε across the channels ➙ threshold effects Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

26

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

Similar patterns per chε reduced @50 MHz

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

27

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

Similar patterns per chε reduced @50 MHz

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

28

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

29

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

30

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

31

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

ε reduced above 80 MHz Single channel

reduced εin 10% of ch

ToT Distribution VS Pulse Amplitude

32

Evaluation of the Performance of PASTA

Good linearityResiduals within detector resolution

● Internal injection- Channel response- Threshold calibration - differential scheme (th

+- th

- ≥ 0)

- Linearity of the front-end● Proton beam

- Frequency-dependent response

reduced εin 10% of ch

Single channel

Similar patterns per chε reduced @50 MHz

Non-flat ε across the channels ➙ threshold effects

ε reduced above 80 MHz

● Data acquisition system- Modular integration of PASTA in the JDRS- User-friendly GUI- Stable operation (incl. in-beam)

● PASTA- Principle of operation verified- Operation of individual channel- Critical optimization of global settings- Frequency-related issues- Significant input for PASTA 2.0

ToT Distribution VS Pulse Amplitude

33