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Amplifier With Waveform Generator HV-AMP400FN-4+400-D

Fast High-Voltage Waveform Generator for Driving Quadrupole Traps

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This waveform generator is a combination of four fast high-voltage amplifiers, one high-voltage offset amplifier, and a programmable digitally controlled waveform generator.

The typical output load of the device is a linear quadrupole trap for heavy ions or microparticles. The device produces an arbitrary waveform intended to create the trapping potential. Four output channels provide two pairs of AC voltages, the first pair provides a direct signal and the second pair an inverted one. Thus, the device acts as a 2-phase supply for a quadrupole trap consisting of four electrodes.

The amplitude of the four output channels is freely variable up to 400 V. Since all channels use the same waveform generator, the amplitude is the same on each output.

The offset of the output voltages determines the potential in the trap center and is adjustable in the range of ±400 V.

Trapping can be terminated by introducing an extraction phase. During this phase, the voltages at the four output channels can be set to independently selectable values. The extraction voltages can also be within the ±400 V margin relative to the offset voltage, i.e. the resulting output voltage may reach ±800 V as during the waveform generation.

#Technical Data


  • Four-channel fast high-voltage amplifier for light capacitive loads
  • Offset amplifier
  • Digitally controlled waveform generator
  • DC accuracy, ultra-low temperature coefficient of the gain
  • 19" case

Output Amplifiers

  • Four channels
  • Output voltage: ±400 V
  • Output current: > 25 mA continuous, > 50 mA pulsed
  • Signal bandwidth: DC–10 MHz ±10%, DC–100 kHz ±1%
  • Power bandwidth: limited by the output current, > 100 kHz with a load of 100 pF
  • Slew rate: about 250 V/µs, depending on the capacitive load
  • Output noise: 200 mVp-p typ. (DC to 500 MHz), 13 mVp-p typ. (DC to 100 kHz)
  • Amplification accuracy at low frequencies: < 600 ppm (200 ppm typ.)
  • Temperature coefficient of the gain at low frequencies: < 10 ppm/K (5 ppm/K typ.)

Offset Amplifier

  • Output voltage: ±400 V
  • Output current: > 15 mA continuous
  • Signal bandwidth: DC–100 Hz (-3 dB)
  • Slew rate: about 1 V/ms


  • Interlock loop: BNC socket, short circuit enables the amplifier
  • Overcurrent protection: output current limiter
  • Overtemperature protection: temperature sensors at the heatsink (shutdown temperature programmable)
  • Voltage: supply voltage supervision


  • Monitor outputs:
    • Four 50 Ω BNC sockets, output impedance: 50 Ω
    • Attenuation -1:1000 without load, -1:2000 with load of 50 Ω (signals are inverted with respect to the main outputs)
    • Accuracy at low frequencies: < 0.2% (0.1% typ.)
    • Temperature coefficient of the attenuation at low frequencies: < 50 ppm/K (20 ppm/K typ.)
    • Signal bandwidth: DC–10 MHz ±10%, DC–100 kHz ±1%
  • LED: Power On, color: green
  • Supply voltages
  • Temperature at the heatsink, the chassis plate, and the CPU
  • Status indicators over the LCD:
    • Power Supply Activated
    • Interlock
    • Fan Failure
    • Amplifier Overheated

Human Interface

  • Monochrome LCD display 128×64 pixels, pixel size: 0.5 mm, pixel color: yellow, background: blue, background illumination: white LED
  • Keypad: 5 keys: 4× direction + 1× "enter"
  • Rotary encoder: 24 positions per revolution, integrated press button
  • Press button for amplifier activation
  • Optional external shutdown button via the interlock loop

Power Supply

  • Rated voltage: 230 V ±10%, 50 Hz
  • Inrush current: limited to 3.6 A
  • Power consumption:
    • Standby (amplifier deactivated): 37 VA
    • Amplifier activated but without signal: 110 VA
    • Maximum (sine 800 Vp-p at 100 kHz): 160 VA
    • Peak: 1.1 kVA
  • Main fuse: T 1.25 A (slow acting), size ø5x20 mm
  • Mains connection: IEC inlet with EMC filter and integrated fuse holder


  • Data link: USB receptacle series B, location: front panel
  • Monitor outputs, trigger inputs and outputs: four 50 Ω BNC sockets for each, location: front panel
  • Output: Amphenol MS3102R22-18S high-voltage panel receptacle with 8 female sockets, location: rear panel
  • Interlock loop: 50 Ω BNC socket, location: rear panel
  • Mains input: IEC inlet, location: rear panel


  • 6 U 19" bench-top case:
    • Height: 266 mm, width: 448 mm, depth: 380 mm
    • Total depth with heatsink, fans, and handles: 488 mm
    • Total height with case feet: 280 mm
  • Heatsink: black anodized extruded aluminum profile on the rear panel
  • Forced cooling:
    • Two 120 mm fans on the heatsink
    • Temperature-dependent regulation of the fan speed
    • Monitored fan operation, warning in the event of fan failures
  • Operating temperature range: +10 – +40 °C
  • Weight: 23 kg
  • Cleaning: only use damp cloth, avoid use of organic solvents


User Manual

HV-AMP400FN-4+400-D_1-00_A.pdf HV-AMP400FN-4+400-D_1-00_A.pdf, 986.9 KB: User manual
Manual.txt Manual.txt, 52 B: Manual revision history


Further user manuals, software, and firmware can be downloaded here: DAFG-1EO

Information on how to open the various file formats can be found here.

#Additional Information


Programmable digital waveform generator module with extraction and offset control

Shipment Contents

  • Power waveform generator HV-AMP400FN-4+400-D
  • Line cord (universal IEC mains lead, length 1.8 m)
  • Control and diagnostic software (see above)
  • User manual (see above)


Output cable with an Amphenol connector MS3106F22-18P
Interface card
USB 2.0 interface card
(Not part of the shipment, please order separately)