PMT High Voltage Control Board Page 9 of 42
Document # 9400-0027-SCD Revision: -
REVISIONSLTR. / ECN / DESCRIPTION / DATE / APPROVED
- / NA / Original release / 04/01/23
8/1/2005 / 3.2.2.5.4.1 corrected
SHEET REVISION STATUS
SHEET / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18
REVISION / - / - / - / - / - / - / - / - / - / - / - / - / - / - / - / - / - / -
SHEET / 19 / 20 / 21 / 22 / 23 / 24 / 25 / 26 / 27 / 28 / 29 / 30 / 31 / 32 / 33 / 34 / 35 / 36
REVISION / - / - / - / - / - / - / - / - / - / - / - / - / - / - / - / - / - / -
SHEET / 37 / 38 / 39 / 40 / 41 / 42 / 43 / 44 / 45 / 46 / 47 / 48 / 49 / 50 / 51 / 52 / 53 / 54
REVISION / - / - / - / - / - / -
SHEET / 55 / 56 / 57 / 58 / 59 / 60 / 61 / 62 / 63 / 64 / 65 / 66 / 67 / 68 / 69 / 70 / 71 / 72
REVISION
SHEET / 73 / 74 / 75 / 76 / 77 / 78 / 79 / 80 / 81 / 82 / 83 / 84 / 85 / 86 / 87 / 88 / 89 / 90
REVISION
SHEET / 91 / 92 / 93 / 94 / 95 / 96 / 97 / 98 / 99 / 100 / 101 / 102 / 103 / 104 / 105 / 106 / 107 / 108
REVISION
CONTROLLED DIST. LIST
1 / 16 / ANTARCTIC ASTRONOMY AND ASTROPHYSICS
2 / 17 / RESEARCH INSTITUTE
3 / 18 / THE UNIVERSITY OF WISCONSIN - MADISON, WISCONSIN
4 / 19 / TITLE
5 / 20 / ICECUBE
6 / 21 / PMT HIGH VOLTAGE CONTROL BOARD
7 / 22 / SPECIFICATION CONTROL DRAWING
8 / 23 / ORIGINATOR / DATE / ENGINEER / DATE / CHECKER / DATE
9 / 24
10 / 25 / LEVEL 2/LEAD / DATE / PRODUCT ASSURANCE / DATE / PROJECT APPROVAL / DATE
11 / 26
12 / 27 / FILENAME / PROJECT NO.
13 / 28 / 9400-0027-SCD.050801.doc / 9000
14 / 29 / DRAWING NO. / SCALE / SIZE / SHEET
15 / 30 / 9400-0027-SCD / NA / A / Page 1 of 42
Contents
1 INTRODUCTION 4
1.1 Purpose 4
1.2 Scope 4
1.3 Responsibility and Records 4
1.3.1 Document Responsibility 4
1.3.2 Document and Verification Records 4
1.4 Item’s Function in the IceCube System 5
2 APPLICABLE DOCUMENTS 6
2.1 Project Requirements 6
2.2 Reference Documents 6
2.3 Order of Precedence 6
3 REQUIREMENTS 8
3.1 Item Identification 8
3.1.1 Definition 8
3.1.2 Functional Description 8
3.1.3 Functional External Interfaces 8
3.1.4 Schematic Diagram 9
3.2 Performance Requirements 10
3.2.1 Functional Requirements 10
3.2.2 Electrical Requirements 10
3.2.3 Mechanical Requirements 15
3.2.4 External Interface Requirements 17
3.2.5 Environmental Requirements 30
3.2.6 Storage Requirements 31
3.3 Design and Construction Requirements 32
3.3.1 Electrical and Electronic Parts 32
3.3.2 High Voltage Generator 32
3.3.3 Printed Circuit Board 32
3.3.4 Board Assembly 33
3.3.5 Restricted Parts, Materials, and Processes 33
3.3.6 Reliability 34
3.3.7 Quality 34
4 VERIFICATION 36
4.1 Responsibility 36
4.2 Special Tests and Examinations 36
4.3 Requirement vs. Verification Cross Reference with Section 3 36
5 PREPARATION FOR DELIVERY 37
5.1 Identification—Part Number and Serial Number 37
5.2 Final Visual Inspection 37
5.3 Packaging and Shipping 37
6 DEFINITIONS 38
6.1 IceCube Acronyms 38
6.2 IceCube Glossary 41
7 APPENDIX 42
Figures
Figure 1 Functional Block Diagram 9
Figure 2 HV Control Board Envelope 15
Figure 3 HV Control Board PCB Dimensions 16
Figure 4 High voltage output cable end preparation requirement 26
Figure 5 Interface Cable Attachment 28
Tables
Table 1 Voltage and Current Specification for Digital Signals 18
Table 2 Timing Specification 18
Table 3 Digital Interface Signals 19
Table 4 Digital Interface Devices 19
Table 5 Interface Signal Multiplexing 20
Table 6 Device Addressing Scheme 20
Table 7 POWER_ON 20
Table 8 HV_DISABLE 21
Table 9 IDENT Device Electrical Characteristics 21
Table 10 IDENT Data Format 22
Table 11 Ribbon Cable Connector Pin Assignment 29
1 INTRODUCTION
1.1 Purpose
This IceCube Specification Control Drawing (SCD) specifies the performance, fabrication, verification, and production acceptance requirements for the PMT High Voltage Control Board used on the IceCube PMT Modular High Voltage Power Supply.
1.2 Scope
This Specification Control Drawing shall be applicable to the design, development, integration, verification, production, validation, logistics, field deployment and disposal of the PMT High Voltage Control Board.
1.3 Responsibility and Records
1.3.1 Document Responsibility
The IceCube Project of the Antarctic Astronomy and Astrophysics Research Institute (AAAIR) at the University of Wisconsin – Madison (UW) is responsible for writing and updating these requirements to ensure they are correct, complete and current. UW AAARI Quality Assurance is responsible for ensuring this document and changes to it are properly reviewed, approved and maintained.
1.3.2 Document and Verification Records
Records of this document and associated verification and qualification records shall be maintained as follows:
a. The approved and signed original of this document shall be maintained per UW AAARI 9000-0004, Document Management Process.
b. Changes to this document shall be via Engineering Change Notices (ECNs) as described in UW AAARI 9000-0004, Document Management Process.
- Verification records shall be maintained as described in Section 4 of this document in compliance with UW AAARI 9000-0003, IceCube Quality Plan.
1.4 Item’s Function in the IceCube System
The IceCube Neutrino Observatory System at the South Pole requires high voltage for one Photomultiplier Tube (PMT) in each of its Digital Optical Module (DOM) sensors. The PMT High Voltage Control Board is one of two subassemblies of the PMT Modular High Voltage (HV) Power Supply. The adjustable-output PMT HV Power Supply creates and supplies approximately 2000 volts maximum anode bias and multiple dynode bias voltages to the PMT inside each DOM sensor. The PMT HV Control Board creates and controls this high voltage in accordance with digital commands from the DOM Main Board. For instance the PMT HV Control Board may adjust its output high voltage to obtain different PMT photon sensitivities. The PMT HV Control Board also measures and reports the value of the output high voltage. The output high voltage is delivered to the PMT HV Base Board where it is applied to the anode for signal extraction and proportionately distributed to the PMT electrodes. There are 5120 Digital Optical Modules in the IceCube system, each containing a PMT HV Control Board in a PMT Modular HV Power Supply. The IceCube system has 4800 DOMs deployed over a kilometer deep in the Antarctic ice with 320 additional DOMs installed on the ice surface, all used for scientific research.
2 APPLICABLE DOCUMENTS
The following documents of the exact issue shown are applicable requirements for this Configuration Item only to the extent they are invoked by specific requirements herein.
2.1 Project Requirements
a. PMT Modular HV Power Supply Engineering Requirements Document, 9400-0016-ERD
b. PMT HV Generator Source Control Drawing, 9400-0068-SCD (Rev -)
c. PMT HV Base Board Specification Control Drawing, 9400-0028-SCD
d. PMT HV Power Supply Interface Control Document, 9400-0016-ICD
e. PMT HV Control Board Schematic, 9400-0027-SCH (Rev A)
f. PMT HV Control Board Ribbon Cable Assembly Drawing, 9400-0022-DWG (Rev -)
g. PMT HV Control Board Fabrication Drawing, 9400-0027-DWG2 (Rev A)
h. PMT HV Control Board Assembly Drawing, 9400-0027-DWG (Rev A)
i. PMT HV Control Board Functional Test Setup and Procedure, 9400-0027-TEST (Rev A)
2.2 Reference Documents
a. JESD8-B, “Interface Standard for Nominal 3 V/3.3 V Supply Digital Integrated Circuits”, JEDEC Solid State Technology Association, September 1999.
b. IPC-2221, §6.3 Electrical Clearance, “B-4 External Conductors with Permanent Polymer Coating”
c. “Book of iButton Standards”, Dallas Semiconductor Corporation, Application Notes Number 937, January, 2002.
d. MIL-HDBK-217F (N1/2) “Parts Stress and Analysis method”
e. IPC-A-600F “Acceptability of Printed Boards”
f. IPC-6012 “Qualification and Performance Specification for Rigid Printed Boards”
g. IPC-A-610C “Acceptability of Electronic Assemblies”
h. MIL-B-81705 “Barrier Materials, Flexible, Electrostatic-Free, Heat Sealable”
2.3 Order of Precedence
a. Conflicts within this document shall be resolved as directed by the IceCube System Engineer in collaboration with the Project Lead responsible for this Design Item.
b. Conflicts between other documents as they relate to or impact this document shall be resolved as directed by the IceCube Project Manager in collaboration with the IceCube System Engineer.
3 REQUIREMENTS
3.1 Item Identification
3.1.1 Definition
The PMT High Voltage Control Board (HV Control Board) is a printed circuit board (PCB) assembly, containing the High Voltage Generator module, power inputs, control logic, output voltage control, and digital interface circuitry, and, together with the PMT HV Base Board, constitutes the PMT Modular High Voltage Power Supply. The HV Control Board is mechanically mounted as a daughter board to the DOM Flasher Board and is electrically connected to the PMT HV Base Board via a high-voltage cable and to the DOM Main Board via a digital interface cable. No electrical connection, including grounds, is present between the HV Control Board and the DOM Flasher Board.
3.1.2 Functional Description
The HV Control Board derives all the power from the DOM Main Board and generates a high voltage in the range of approximately 1000 to 2100 VDC and supplies it to the PMT HV Base Board, where the high voltage potential is divided and distributed to the individual electrodes of the PMT (Figure 1). The digital interface circuitry supports the following commands issued by the DOM Main Board:
a. Adjust the HV Generator output voltage
b. Report the HV Generator’s voltage monitor output value
c. Report the digital serial number uniquely identifying each individual HV Control Board
d. Respond to power supply power ON/OFF commands
e. Respond to high voltage output ENABLE/DISABLE commands
f. The digital interface circuitry providing the above functions may be either internal or external to the HV Generator either in part or as a whole.
All the power for the HV Generator and the digital interface circuitry is provided by the DOM Main Board.
3.1.3 Functional External Interfaces
The HV Control Board has four external functional interfaces:
a. Power input from the DOM Main Board
b. Bidirectional digital control and data from/to the DOM Main Board
c. High voltage output to the PMT HV Base Board
d. Structural mount to the Flasher Board
These interfaces are illustrated in Figure 1.
3.1.4 Schematic Diagram
Refer to the IceCube document # 9400-0027-SCH.
Figure 1 Functional Block Diagram
PMT High Voltage Control Board Page 40 of 42
Document # 9400-0027-SCD Revision: -
3.2 Performance Requirements
3.2.1 Functional Requirements
3.2.1.1 High Voltage Generation
The HV Control Board shall generate an adjustable high voltage output for the PMT HV Base Board, using the power provided by the DOM Main Board.
3.2.1.2 Digital Command Response
The HV Control Board shall respond to the following digital control commands issued by the DOM Main Board:
a. ON/OFF command for switching the primary power of the entire HV Control Board
b. ENABLE/DISABLE command for enabling or disabling the high voltage output
c. Serial DAC code for setting the High Voltage output value
3.2.1.3 Digital Output
The HV Control Board shall provide the following digital output to the DOM Main Board:
a. Serial ADC code representing the High Voltage Monitor Output value
b. Serial digital code uniquely identifying the individual HV Control Board
3.2.2 Electrical Requirements
3.2.2.1 Input Voltage
3.2.2.1.1 +5 Volts DC
The HV Control Board shall receive a power input voltage of +5 VDC ±5%.
3.2.2.1.2 –5 Volts DC
The HV Control Board shall receive a power input voltage of -5 VDC ±5%.
3.2.2.2 Input Current
3.2.2.2.1 +5 Volts Input Current
The HV Control Board input current for +5 Volt power shall not exceed 70 mA.
3.2.2.2.2 –5 Volts Input Current
The HV Control Board input current for -5 Volt power shall not exceed 30 mA.
3.2.2.3 Input Power
The total input power to the PMT HV Control Board shall not exceed 350 mW.
Note The HV Generator shall receive power from the +5V source alone and consume no more than 300mW (Sec 3.2.2.1.1, 9400-0068-SCD.041119).
3.2.2.4 Internal Grounds
3.2.2.4.1 Analog Ground
a. The analog signal ground on the HV Control Board shall be referenced by the HV Generator and by the appropriate analog ground pin(s) of the DAC, the ADC, and, if present, the voltage reference device.
b. The shielding case of the HV Generator shall be connected to the analog ground.
c. The analog ground shall be connected to the DOM Main Board interface connector pin(s) designated as DGND at a single point.
3.2.2.4.2 Digital Ground
Digital Ground and Power Ground shall be one on the PCB and shall refer to the net designated as DGND on the DOM Main Board interface connector.
3.2.2.4.3 RF Ground
The HV Control Board shall use the Power Ground as the RF ground.
3.2.2.4.4 Power Ground
Power Ground and Digital Ground shall be one on the PCB and shall refer to the net designated as DGND on the DOM Main Board interface connector.
3.2.2.5 High Voltage Generation
3.2.2.5.1 Power ON/OFF Transients
There shall be no HV output upon power up of the HV Control Board.
3.2.2.5.2 High Voltage Enable/Disable
a. The HV output shall reach within 10% of the target value in less than 5 seconds after receiving a HV enable command under a resistive load of 130 MW ± 5%.
b. The HV output shall reach below 10% of the initial value in less than 5 seconds after receiving a HV disable command under a resistive load of 130 MW ± 5%.