Model 3102D 0-2 kv H.V. Power Supply

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1 Features Compact single width NIM package Regulated up to ±2000 V dc. 1 ma output Noise and ripple 3 mv peak to peak Overload and short circuit protected Overload, inhibit and polarity status indicators Inhibit and overload latching circuits Digital front panel meter Model 3102D 0-2 kv H.V. Power Supply Description The CANBERRA Model 3102D High Voltage Power Supply is a single-width NIM module designed primarily for use with photomultiplier and electron multiplier tubes. But it can be used with any detector requiring a bias voltage up to 2000 V and a current level of 1 ma or less. The 3102D allows the user to select from two continuously adjustable outputs, one ranging from ±15 to ±2000 V dc and the other from ±1.5 to ±200 V dc. The output voltage is measured and displayed by a three-digit voltmeter. In addition, this unit allows the user to select the output voltage polarity with an internal control. The 3102D can withstand any overload or short circuit for an indefinite period of time. It can be set using an internal jumper to allow for a manual reset or an automatic reset when the fault condition is removed. The 3102D features an output rise time of five seconds to protect preamplifiers and detectors from excessive surge currents while charging. Specifications INPUTS INPUT POWER The Model 3102D is powered from a standard NIM Bin and power supply, such as the Model 2100, 2000 or INHIBIT Logic low or ground inhibits the HV outputs; max logic low 0.7 V; logic high 1.3 V or open circuit enables. OUTPUTS HV OUTPUT ±15 to ±2000 V dc, continuously adjustable; 1 ma output current capability; rear panel SHV connector. 10 OUTPUT ±1.5 to ±200 V dc, continuously adjustable; Z out = 20 MΩ; rear panel SHV connector. CONTROLS ON/OFF Front panel toggle switch enables or disables output. RESET Pushbutton restores normal operation following a latched Inhibit and/or overload fault condition. VOLTAGE Front panel 10-turn control permits continuous adjustment of the output voltage. POLARITY Internal programming plug sets output polarity. INDICATORS HV OUTPUT 3-digit panel meter; 0 to 2.00 kv. POLARITY Front panel LEDs indicate polarity continuously. INHIBIT LED indicates Inhibit status. OVERLOAD LED indicates overload status. Phone contact information Benelux/Denmark (32) Canada Central Europe +43 (0) France (33) Germany (49) Japan Russia (7-495) United Kingdom (44) United States (1) For other international representative offices, visit our web site: or contact the CANBERRA U.S.A. office. NSP0003 2/07 Printed in U.S.A.

2 Model 3102D 0-2 kv H.V. Power Supply PERFORMANCE RIPPLE AND NOISE 3 mv peak to peak at 1 µa. OUTPUT STABILITY Long term drift of output voltage is 0.01%/hr. and 0.02%/8 hr. at constant input line voltage, load, and ambient temperature after a 30 minute warmup. TEMPERATURE COEFFICIENT ±50 ppm/ C after 30 minute warmup, operating range 0 to 50 C. REGULATION 0.001% variation in output voltage over the load range and 0.001% for ±0.1% input voltage change within the operating range at constant ambient temperature. OVERLOAD PROTECTION Power supply will withstand any overload, including a short circuit for an indefinite period. CURRENT LIMIT 1.3 ma maximum. DIAL ACCURACY ±1% of full scale. METER ACCURACY ±0.6% of full scale plus 10 volts. CONNECTORS HV OUTPUT Rear panel SHV. 10 OUTPUT Rear panel SHV. INHIBIT Rear panel BNC. POWER REQUIREMENTS +24 V 70 ma +12 V 160 ma* 24 V 10 ma 12 V 150 ma *With Brightness Control J4 set to HI, +12 V will draw 265 ma, which exceeds the normal Bin allotment of 167 ma for a single-width module. PHYSICAL SIZE Standard single width NIM module 3.43 x cm, (1.35 x 8.71 in.) per DOE/ER-0457T. NET WEIGHT 1.4 kg (3.1 lb). SHIPPING WEIGHT 2.4 kg (5.3 lb). ENVIRONMENTAL OPERATING TEMPERATURE 0 to 50 C. OPERATING HUMIDITY 0-80% relative, non-condensing. Meets the environmental conditions specified by EN 61010, Installation Category I, Pollution Degree Canberra Industries, Inc. All rights reserved.

3 Low-Noise Current Preamplifier SR570 DC to 1 MHz current preamplifier SR570 Current Preamplifier 5 fa/ Hz input noise 1 MHz maximum bandwidth 1 pa/v maximum gain Adjustable bias voltage Two configurable signal filters Variable input offset current Line or battery operation RS-232 interface The SR570 is a low-noise current preamplifier capable of current gains as large as 1 pa/v. High gain and bandwidth, low noise, and many convenient features make the SR570 ideal for a variety of photonic, low-temperature and other measurements. Gain The SR570 has sensitivity settings from 1 pa/v to that can be selected in a sequence. A vernier gain adjustment is also provided that lets you select any sensitivity in between. Gain can be allocated to various stages of the amplifier to optimize the instrument s performance. The low-noise mode places gain in the front end of the amplifier for the best noise performance. The high-bandwidth mode allocates gain to the later stages of the amplifier to improve the frequency response of the front end. In the low-drift mode, the input amplifier is replaced with a very low input-current op amp, reducing the instrument s DC drift by a factor of Filters SR $2295 (U.S. list) The SR570 contains two first-order RC filters whose cutoff frequency and type can be configured from the front panel. Together, the filters can be configured as a 6 or 12 db/oct rolloff low-pass or high-pass filter, or as a 6 db/oct rolloff band-pass filter. Cutoff frequencies are adjustable from 0.03 Hz to 1 MHz in a sequence. A filter reset button

4 SR570 Current Preamplifier is included to shorten the overload recovery time of the instrument when long filter time constants are used. Input Offset and DC Bias An input offset-current adjustment is provided to suppress any unwanted DC background currents. Offset currents can be specified from ±1 pa to ±1 ma in roughly 0.1 % increments. The SR570 also has an adjustable input DC bias voltage (±5 V) that allows you to directly sink current into a virtual null (analog ground) or a selected DC bias. Toggle and Blanking Two rear-panel opto-isolated TTL inputs provide additional control of the SR570. A blanking input lets you quickly turn off/on the instrument's gain which is useful in preventing front-end overloading. A toggle input inverts the sign of the gain in response to a TTL signal, allowing you to perform synchronous detection with a chopped signal. Battery Operation Three rechargeable lead-acid batteries provide up to 15 hours of battery-powered operation. An internal battery charger automatically charges the batteries when the unit is connected to the line. The charger senses the battery state and adjusts the charging rate accordingly. Two rear-panel LEDs indicate the charge state of the batteries. When the batteries become discharged, they are automatically disconnected from the amplifier circuit to avoid battery damage. Why Use a Current Amplifier? Many people wonder why current amplifiers are necessary. Why not simply terminate a current source with a resistor and amplify the resulting voltage with a voltage amplifier? The answer is twofold. To get a large voltage from a current, large resistors are necessary. In combination with cable capacitance, this can lead to unacceptable penalties in frequency response and phase accuracy. Current amplifiers have much better amplitude and phase accuracy in the presence of stray capacitance. Secondly, using resistive terminations forces the current source to operate into possibly large bias voltages a situation which is unacceptable for many sources and detectors. Current amplifiers can sink current directly into a virtual null or to a selected DC bias voltage. Ordering Information SR570 Low-noise current preamplifier $2295 O560RMD Double rack mount kit $85 O560RMS Single rack mount kit $85 O560SB Spare battery set (3 batteries) $150 No Digital Noise The microprocessor that runs the SR570 is "asleep" except during the brief interval it takes to change the instrument's setup. This ensures that no digital noise will contaminate lowlevel analog signals. RS-232 Interface The RS-232 interface allows listen-only communication with the SR570 at 9600 baud. All functions of the instrument (except power on) can be set via the RS-232 interface. The RS-232 interface electronics are opto-isolated from the amplifier circuitry to provide maximum noise immunity. SR570 rear panel

5 SR570 Current Preamplifier 10-9 Low Noise Mode 1 Low Noise Mode Current Noise (Amps/ Hz) Gain / Nominal Gain (db) k 10k 100k k 1M 100M 10-9 High Bandwidth Mode 1 High Bandwidth Mode Current Noise (Amps/ Hz) Gain / Nominal Gain (db) k 10k 100k k 1M 100M

6 SR570 Specifications Input Inputs Virtual null or user-set bias (±5 V) Input offset ±1 pa to ±1 ma adjustable DC offset current Maximum input ±5 ma Noise See graphs on previous page Sensitivity 1 pa/v to in sequence (Vernier adjustment in 0.5 % steps) Frequency response ±0.5 db to 1 MHz (Adjustable front-panel frequency response compensation for source capacitance) Grounding Amplifier ground is fully floating. Amplifier and chassis ground are available at rear panel. Input ground can float up to ±40 V. Filters Signal filters Gain allocation Low Noise High Bandwidth Low Drift 2 configurable (low-pass or highpass) 6 db/oct rolloff filters. 3 db points are settable in a sequence from 0.03 Hz to 1 MHz. Gain is allocated to the front end for best noise performance. Front-end gain is reduced for optimum frequency response. Low bias current amplifier is used for reduced drift at high sensitivity. Filter reset Output Long time constant filters may be reset with front-panel button. Gain accuracy ±(0.5 % of output C DC drift See table below Maximum output ±5 V into a high impedance load General External blanking External toggle Rear panel biasing Computer interface Power Dimensions Weight Warranty TTL input sets gain to zero TTL input inverts gain polarity ± ma, referenced to amplifier ground RS-232, 9600 baud, receive only 100/120/220/240 VAC, 6 W charged, 30 W while charging. Internal batteries provide 15 hours of operation between charges. Batteries are charged while connected to the line. 8.3" 3.5" 13.0" (WHD) 15 lbs. (batteries installed) One year parts and labor on defects in materials and workmanship Sensitivity Bandwidth* Noise (/ Hz)** Temp. coefficient DC Input (A/V) ±(% input + offset)/ C Impedance High BW Low Noise High BW Low Noise Low Drift (11 to 28 C) All Modes MHz 1.0 MHz 150 pa 150 pa 0.01 % + 20 na 1 Ω MHz 500 khz 100 pa 60 pa 0.01 % + 2 na 1 Ω khz 200 khz 60 pa 2 pa 0.01 % pa 100 Ω khz 20 khz 2 pa 600 fa 0.01 % + 20 pa 100 Ω khz 2 khz 600 fa 100 fa 0.01 % + 2 pa 10 kω khz 200 Hz 100 fa 60 fa 0.01 % fa 10 kω Hz 15 Hz 60 fa 10 fa % + 40 fa 1 MΩ Hz 10 Hz 10 fa 5 fa % + 20 fa 1 MΩ Hz 10 Hz 5 fa 5 fa % + 20 fa 1 MΩ Hz 10 Hz 5 fa 5 fa % + 20 fa 1 MΩ * Frequency compensation adjusted for flat frequency response ** Average noise in the frequency range below the 3 db point but above the frequency where 1/f noise is significant