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Specialized / Combined

Quadrupole Power Supply QPS400-3
Power Supply Unit for 3D Quadrupole Traps, 3× 400 V

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This device consists of three identical precision high-voltage power amplifiers for the symmetrical supply of a 3D quadrupole trap.

The connected trap is supplied by a combination of a 40-times amplified AC voltage and a 4-times amplified DC or low-frequency voltage. The AC voltage provides the storage of electrically charged objects in the trap, the DC or low-frequency voltage is designed for the gravity compensation of heavy objects and for electrical cooling.

Typical applications: Power supply of electrodynamic quadrupole traps for storing micro- and nanoparticles or heavy ions, for precise measurements of specific charge or for electrical cooling of stored particles

Technical Data

Characteristics

  • Precise high-voltage amplifier for electrodynamical quadrupole traps
  • DC accuracy
  • Extremely low temperature coefficient of amplification
  • High bandwidth
  • Low noise
  • Temporarily short-circuit–proof

Input

  • Input voltage: ±10 V max.
  • Input impedance: 47 kOhm

Output

  • Function:
    • VTop = -40VAC - 4VDC
    • VMid = +40VAC - 4VM
    • VBot = -40VAC + 4VDC
  • Output voltage: ±400 V min. (> 800 Vpp)
  • Output current: ±50 mA max.
  • Bandwidth:
    • AC input (±10%): 3.5 Hz –  >1 MHz
    • DC input (-3 dB): DC – 100 kHz
  • Power bandwidth: > 100 kHz (200 kHz typ.)
  • Output offset voltage: < 100 µV
  • Drift of the output voltage: < 1 µV/K
  • Noise (DC-10 MHz): 3 mVeff (typ.)
  • Accuracy of the amplification at low frequencies: < 200 ppm (100 ppm typ.)
  • Temperature coefficient of the amplification at low frequencies: < 10 ppm/K (5 ppm/K typ.)

Monitor Output

  • Attenuation: 1:40 of the output voltage
  • Output current: ±20 mA max.
  • Output offset voltage: < 100 µV
  • Drift of the output voltage: < 25 µV/K (5 µV/K typ.)
  • Accuracy of the attenuation at low frequencies: < 0.2% (0.1% typ.)
  • Temperature coefficient of the attenuation at low frequencies: < 50 ppm/K (25 ppm/K typ.)
  • Bandwidth (±10%): DC –  >1 MHz

Power Supply

  • Rated voltage: 230 V or 115 V ±10%
  • Rated frequency: 50/60 Hz

General

  • 19" case
  • Dimensions:
    • 2 U 19" plug-in case for mounting in a 19" cabinet (height: 88 mm, width: 483 mm)
    • Depth with heat sink without handles: 265 mm
  • Weight: 6.8 kg

Download

User Manual

Description.pdf Description.pdf, 1052 KB: Download the user manual
Information on how to open the various file formats can be found here.

Additional Information

Shipment Contents

  • Quadrupole power supply unit QPS400-3 in 19" case
  • Line cord (universal IEC mains lead, length 1.8 m)
  • Output cables (3 pcs. 93 Ohm coaxial cable with 93 Ohm BNC jacks, length 1.2 m each)
  • Ground wire (flexible wire 1 mm2 with 4 mm cable eyes, length 2 m)
  • Material for mounting in a 19" cabinet (4 pcs. M6 screws with washers and cage nuts)
  • User manual (see below)

Accessories

Coaxial cables
BNC, SHV, MHV, and combinations
(Not part of the shipment, please order separately)