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Final Design
High Voltage Module User’s Manual Page 1
USER’S
MANUAL
High Voltage Module
Instrumentation and
Development Laboratory
by Cameron Asaoka
March 2017
Final Design
High Voltage Module User’s Manual Page 2
Revision Sheet
Release No. Date Revision Description
Rev. 0 User’s Manual Template and Checklist
Rev. 1 Conversion to WORD 2016 format
Rev. 2 Updated information with James
Rev. 3 Updated environmental Parameters
CHK #NO Dr. Varner meeting
Rev. 5 4/13 Meeting with James
Final – 00A 5/10 Finished
Final Design
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User’s Manual
Authorization Memorandum
I have carefully assessed the User’s Manual for the (System Name). This document has been completed
in accordance with the requirements of the HUD System Development Methodology.
MANAGEMENT CERTIFICATION - Please check the appropriate statement.
______ The document is accepted.
______ The document is accepted pending the changes noted.
______ The document is not accepted.
We fully accept the changes as needed improvements and authorize initiation of work to proceed. Based
on our authority and judgment, the continued operation of this system is authorized.
_______________________________ _____________________
NAME DATE
Project Leader
_______________________________ _____________________
NAME DATE
Lab Director
_______________________________ _____________________
NAME DATE
Program Area/Sponsor Representative
_______________________________ _____________________
NAME DATE
USER'S MANUAL
Final Design
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TABLE OF CONTENTS
Page #
1.0 GENERAL INFORMATION ...............................................................................................................
1.1 System Overview ........................................................................................................................
1.2 Project References .......................................................................................................................
1.3 Authorized Use Permission .........................................................................................................
1.4 Points of Contact ......................................................................................................................... 1.4.1 Information ..................................................................................................................................
1.4.2 Coordination ................................................................................................................................
1.4.3 Help Desk ....................................................................................................................................
2.0 GETTING STARTED WITH THE HV BOARD .................................................................................
2.1 Beginning ....................................................................................................................................
2.2 Opening ....................................................................................................................................... Functions[What the Board Does] ...............................................................................................................
2.3 Utilization ....................................................................................................................................
2.4 Warning .......................................................................................................................................
3.0 REFERENCE DIAGRAMS .................................................................................................................
3.1 Overview of High Voltage Board ...............................................................................................
3.2 Front View ...................................................................................................................................
3.3 Back View ...................................................................................................................................
4.0 PROBLEMS .........................................................................................................................................
5.0 FUTURE DIRECTIONS ......................................................................................................................
Final Design
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1.0 GENERAL INFORMATION
Final Design
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1.0 GENERAL INFORMATION
1.1 System Overview
DC high voltage power supply in NIM Format
Control the output of the voltage using a Raspberry PI and a display with a dial (encoder)
Graphical User Interface powered by a Raspberry PI
High Energy Physics Group / Instrumentation Development Laboratory
System category:
Major application: performs clearly defined functions for interfacing with a Photo
Multiplier Tube which divides the voltage further for use with a scintillator use with
cosmic particle detection
General support system: provides power to a number of high energy particle detectors
for a variety of users and applications
Operational status:
Operational – Single Module
Operational Ambient Temperature: ~25C
● Warning: Working with high voltage is dangerous and should only be done accompanied by
the help of another person(s).
● In case of emergency call your local fire/police department and report the incident to your
administrator
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1.2 Display Board
Display Board works as a user interface between:
- Control unit (Raspberry Pi)
- High Voltage Board
Fig. 0 Overview of the Raspberry PI I used
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1.3 Power Analysis
Display Board
Component Current Draw
Raspberry Pi 700-1000 mA
Display 330mA (max)
DAC 1.3 mA
ADC 1.5 mA
Other
components
<100 mA
HV Board
Ultravolt - AA
modules
1350mAwith Full
load from +6 / -6 /
+24 Pin’s
Ultravolt - AA
Modules (tested)
1330mA with Full
load (1 channel)
Ultravolt Thermal Specifications
Final Design
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This is where two more
UltraVolt modules could
go that would allow us
to have two additional
channels on the High
Voltage Board. Due to
design constraints, with
the Raspberry Pi in the
way of the Molex
connectors for the
modules, its unable to be
used but saves on cost of
the board as each
UltraVolt module cost
$500 apiece.
OVERVIEW OF HIGH VOLTAGE BOARD
Raspberry PI
ULTRAVOLT
NIM Connector
Fig. 1 Overview of the High Voltage Board
Final Design
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FRONT AND BACK PLATE DIAGRAMS
24V
SHV Connector
GND -6V
6V
SHV Connector
Ethernet Connector Display
Dial
Channel 1
Channel 2
Fig. 2 A look at the front panel Fig. 3 A look at the back plate
Final Design
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1.3 Project References (Leading Professor) Dr. Gary Varner
(Leading Engineer) Matthew Andrew
(Graduate Student) James Bynes (software/firmware)
(Graduate Student) Vhitori Virta (hardware)
(Graduate Student) Reed (Software)
(Undergraduate Student) Cameron Asaoka (Author)
(Undergraduate Student) Nathan Park (Co-Author)
1.4 Points of Contact
For questions or concerns regarding the use of this product please email the Instrumentation Development
Laboratory at Dr. Gary Varner, Director of the Instrumentation Laboratory at [email protected].
Matthew Andrew, Leading Engineer at [email protected]. James Bynes, Engineer for Software
Development at [email protected]. Vihtori Virta, Engineer for Hardware Development at
[email protected]. Reed
Final Design
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2.0 Getting Started
Final Design
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2.1 Utilization To set the desired voltage, looking at Figure. 1, after the board is given enough time to boot and the main
program is initialized then by using the dial just below the display it allows you to switch between the
different settings on the display.
Display on:
Then by simply tapping on the dial ONCE, will allow you to set the voltage level. By flipping the switch
on the main voltage will ramp up on the positive terminal to the set voltage.
Warning: Do not touch the controls on the dial while the board is ramping up.
Warning: Do not set Voltage above 4000V on the display.
To Safely turn off the voltage,
Flip the switch on the Channel 1 or Channel 2 and wait approx. five seconds for the voltage to ramp
down.
[Left] Fig. 4 Channel 1 [Middle] Fig. 5 Channel 2 [Right] Fig. 6 High Voltage ON
Channel 1 SET
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3.0 Reference Diagrams
Final Design
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Display Schematic
Fig. 7 First look at the Schematic showing wiring for display
Final Design
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Schematic Ultravolt Connection
Fig. 8 Schematic of the Ultravolt ; Negative PSU
Final Design
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Schematic Third Page
Fig. 9 Third look at the schematic showing both positive and negative Ultavolt
Final Design
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4.0 Problems
Final Design
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Some of the Software Problems
- Setting Voltage is sometimes a problem
- Problem with the ‘Amps’ on the display
- Transfer function is a problem
- Utilizing a load with the Board
- No matter how I change the transfer function on the board related to the input and output
voltage on the ultravolt, it still isn’t fully correct; possibly some more testing is needed.
Some of the Hardware Problems
- Needs to have case fully attached
- Possible use of up to four (4) channels in the future might be possible with hardware revision
Fig. 10 Showing how we are testing the HV Module
Final Design
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y = 99.71x - 191.11
y = 101.54x - 192.24
-500
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
0 5 10 15 20 25 30 35 40 45 50
WITHOUT LOAD
Series1 Series3 Linear (Series1) Linear (Series3)
y = 0.0882x + 0.332
0
50
100
150
200
250
300
350
400
0 500 1000 1500 2000 2500 3000 3500 4000 4500
WITH LOAD
Series1 Series2 Series3 Linear (Series2)
Fig. 11 [Above] Fig. 12 [Below] Graph of both HV Module without load and with load
By looking at the graphs you can see that there is a linear relationship related to the input voltage and
the output voltage.
Unfortunately, this isn’t the case as it stands on more of a polynomial transfer function.
Final Design
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IDEAL Transfer Function
Fig. 13 Graph of both HV Module without load and with load
This graph represents the transfer function related to the input of the Ultravolt to the output voltage
with a input of up to 4.64V at 100% input and 4000V with a 100% output on the Ultravolt. Also for a
Negative Voltage Supply it has a 100% , 4000V output at 0.36V.
Also these Ultravolt Modules can go past 100% for a 107% output at 4350V
Final Design
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5.0 Future Directions
Final Design
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Future Directions
- We hope that with future revisions it will allow us to fix all the problems - Possibly fixing the Ultravolt transfer function - Creating a graph of the input voltage on the DAC and the output voltage on the ultravolt - Work on the ADC either needs replacement of software fixing
Final Design
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Appendix
Final Design
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