Drift Presentation
-
Upload
kevin-kuwata -
Category
Documents
-
view
87 -
download
1
Transcript of Drift Presentation
![Page 1: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/1.jpg)
Electronics for the DRIFT Detector
Kevin KuwataDr. Jean-Luc Gauvreau & Dr. Dan Snowden-Ifft
July 31, 2013
![Page 2: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/2.jpg)
What is Dark Matter?Matter in the Universe
15%
85%
Dark Matter Matter
![Page 3: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/3.jpg)
What is Dark Matter?
• Does not interact through electromagnetic radiation
• Does interact with gravity
• Theory points towards weak force
![Page 4: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/4.jpg)
DRIFT
Carbon disulfide (CS2)
![Page 5: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/5.jpg)
DRIFT
CS2-
CS2
Cathode
Wires
![Page 6: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/6.jpg)
Current Design:
Pre-Amp Shaper DigitizerDetector
Wire
![Page 7: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/7.jpg)
Current Design Cost• Pre-Amp: CR110
• $155.00
• Shaper: CR200
• $ 155.00
• Digitizer:
• $500
• Per Wire Total: $810 per channel
![Page 8: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/8.jpg)
Grouping Wires1
2
3
4
5
6
7
8
9
10
11
12
Ch. 1Ch. 2
Ch. 3
Ch. 4
... ... ... ...
![Page 9: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/9.jpg)
Problems:
• Grouping increases capacitance, due to large number of wires hooked up to each channel, which increases the noise to an unacceptable level
• No information about location of event
![Page 10: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/10.jpg)
Grouping Wires1
2
3
4
5
6
7
8
9
10
11
12
Ch. 1Ch. 2
Ch. 3
Ch. 4
... ... ... ...
![Page 11: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/11.jpg)
Solution: Multiplex Selection
• Reduce the noise by ungrouping
• Requires inexpensive electronics
![Page 12: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/12.jpg)
Brookhaven National Laboratory (BNL)
• Replaces Pre-Amplifier and Shaper
• Developed the integrated chip (IC) that allows the detector to be sensitive to quantities of charge.
• 16 wires per BNL Chip
• $100 per wire previously, down to $5 per wire
![Page 13: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/13.jpg)
BNL Board
InputOutput Output
BNLControl
![Page 14: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/14.jpg)
BNL details
• Gain
• Peak time
• AC coupling
• Test signal
![Page 15: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/15.jpg)
Programming the BNL Board: Arduino Control Board
• The BNL board can be programmed by sending a series of pulses
• LabJack® initially programming BNL board, now using Arduino Mega2560
![Page 16: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/16.jpg)
Multiplexing
• Multiplexing: process of taking selecting one of several signals
• Allows for the individual wire testing
![Page 17: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/17.jpg)
Multiplexer
Output
Inputs
![Page 18: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/18.jpg)
Multiplexer: Address
• The “Address” of the multiplexer can be thought as a street address of a house
Output
Inputs
S0S1
![Page 19: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/19.jpg)
Address Selection
• S0 and S1 determine the address. S0 and S1 are binary (1,0)
(0,0) (0,1)
(1,0) (1,1)
Output
= 00
= 11
= 2
2
= 3
3
![Page 20: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/20.jpg)
Address Selection
• (S0, S1)
(0,0) (0,1)
(1,0) (1,1)
2
1 3
0
Output
![Page 21: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/21.jpg)
Multiplexing Wires1
2
3
4
5
6
7
8
9
10
11
12
Ch. 1Ch. 2
... ... ... ......
Output
![Page 22: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/22.jpg)
Multiplexing Board
• Multiplexing board uses 17, 8-channel multiplexing integrated circuits to select 1 wire out of a 120.
![Page 23: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/23.jpg)
Multiplexing Board
![Page 24: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/24.jpg)
Multiplexing BoardOutput
Input
![Page 25: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/25.jpg)
Measurements
![Page 26: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/26.jpg)
Height MeasurementsMax Height
Max
Hei
ght (
Volts
)
0.00
0.75
1.50
2.25
3.00
Channel0.0 12.2 24.4 36.6 48.8 61.0 73.2 85.4 97.6 109.8 122.0
• σ = ± 2 %
• x̅ = 2.46 V ± .05
![Page 27: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/27.jpg)
Height MeasurementsMax Height
Volta
ge (V
)
2.3500
2.3875
2.4250
2.4625
2.5000
Wire 0.0 12.2 24.4 36.6 48.8 61.0 73.2 85.4 97.6 109.8 122.0
![Page 28: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/28.jpg)
Width @ 50% Height Measurements
• σ = ± 2%
• x̅ = 2.48 ±.05 µS
Width
Wid
th (µ
S)
0.00
0.65
1.30
1.95
2.60
Channel0 12 24 36 48 60 72 84 96 108 120
![Page 29: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/29.jpg)
Width @ 50% Height Width
Wid
th (µ
S)
2.38
2.43
2.49
2.54
2.60
Channel0 12 24 36 48 60 72 84 96 108 120
![Page 30: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/30.jpg)
Noise Measurements
• noise 3500 electrons, grouping
• noise bnl 600 electrons
• 600 electrons noise after Multiplexer Board
• Boards & Detector Total noise: 750 electron
• ~1 trillion (10^12) electrons in static shock
electrons involved in astatic discharge
![Page 31: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/31.jpg)
Supplementary Slides
![Page 32: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/32.jpg)
Supplementary Slide: Address Selection
• S0 and S1 determine the address. S0 and S1can be either On (1) or Off (0).
(0,0) (0,1)
(1,0) (1,1)
0 1
0
1
Output
= 00
= 11
= 2
2
= 3
3
![Page 33: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/33.jpg)
Supplementary Slide: Address Selection
• S0 and S1 determine the address. S0 and S1can be either On (1) or Off (0).
(0,0) (0,1)
(1,0) (1,1)
0 1
0
1
2
1 3
0
Output
![Page 34: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/34.jpg)
Supplementary Slide: Address Selection
• S0 and S1 determine the address. S0 and S1can be either On (1) or Off (0).
(0,0) (0,1)
(1,0) (1,1)
0 1
0
1
2
1 3
0
Output
![Page 35: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/35.jpg)
Supplementary Slide:
![Page 36: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/36.jpg)
BNL Monitoring
• Arduino monitors “Status” line of the BNL
• Notifies user of a possible error in the BNL parameters
• Automatically reset’s BNL boards if they become un-programmed
![Page 37: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/37.jpg)
BNL Monitoring
Is the Status OK?
No yes
Reset
> 1.0 Resets/Minute?
No yesTurn On Indicator
Light
![Page 38: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/38.jpg)
Multiplexing Wires
Ch. 1
19
17Ch. 2
21018
Ch. 3
81624
Multiplexers (Mux)
![Page 39: Drift Presentation](https://reader031.fdocumento.com/reader031/viewer/2022020113/58787a091a28ab466c8b4b4b/html5/thumbnails/39.jpg)
In-Field Programming
• Ability to change settings away from computer
• no technical programming required