EM high voltage power supply

INTRODUCTION

Wisman’s EM series is designed to power the electron beam of scanning electron microscopes. It provides acceleration power, bias power and filament power in a compact package. At the same time, it integrates the commonly used scintillator power supply, PMT power supply and collector power supply for electron microscopes. It constitutes the power supply of the electron microscope system.Wisman’s own high-voltage design and packaging technology has made the EM series of electron microscope high voltage power supplies a noticeable improvement in size, cost and performance. The EM series provides excellent adjustability, high reliability, and low ripple and high stability. The accelerating power supply voltage can be given from 0 to -30kV, and the current is 300uA. EM series provides reference accelerant suspension bias and filament power supply. The power supply adopts fully digital communication control to minimize the influence of external noise on the system and provides accelerating pole current display referenced to ground. Wisman’s EM series has arc, short circuit protection, overvoltage protection, and overcurrent protection functions.

Typical applications:

SEM（Scanning Electron Microscope）

Eelectron Beam

Metal 3D Printer

Vacuum Gun

Ion Beam Etching

Focus Ion Beam Lithography

Scientific Experiment

Industrial Applications

SPECIFICATIONS

Input Voltage: +24Vdc, ±5%,

Accelerator Power Supply

High Voltage Outputs:

Output Voltage:

EM20N4 output ranges from 20V~- 20kV; EM30N6 output ranges from 30V~- 30kV

0V to -20kV full load with respect to ground

Output Current: 200μA maximum

Load Regulation: <±100ppm(from  no load to full load ).

Line Regulation: <±100ppm(Input voltage changes 10%).

Ripple : <10ppm

Temperature coefficient: 25ppm/°C

Stability: 10ppm/3 minutes after 1 hour’s  warm up

BIAS Power Supply

Output voltage ：Ranges from 0~ -2000Vdc

Output current ：0~ 150uA.

Load Regulation ：≤0.2%(from no load to full load ).

Line Regulation ： ≤0.1%(Input Voltage changes 10%).

Ripple ：≤10ppm.

Temperature Coefficient ：25ppm/℃.

Stability ：0.001% /3min after 1 hour’s warm up.

Filament Power Supply

Output current：Output current ranges from 0~3A，load 1 Ω.

Load Regulation ：±0.1%(from no load to full load ).

Line Regulation ： ± 0.1%(Input Voltage changes 10%).

Ripple ：≤0.1%..

Temperature Coefficient ：25ppm/℃.

Stability ：100ppm/ 10min after 1 hour’s warm up.

Scintillator Power Supply（optional）

Output Voltage：ranges from 0~ 10kVdc,

Output current ：0~250uA.

Load Regulation：<0.001% (from no load to full load).

Line Regulation：≤0.001%(Input Voltage changes 10%).

Ripple:≤0.001%.

Temperature Coefficient:25ppm/℃.

Stability:≤0 007% /hr.≤0.01% /8hr,after 1 hour’s warm up

Collector Power Supply（Optional )

Output Voltage:ranges from 0~ 400Vdc,

Output current :0~500uA.

Load Regulation:±0.001% (from no load to full load).

Line Regulation:±0.001%(Input Voltage changes 10%).

Ripple:≤0.001%，

Temperature Coefficient:25ppm/℃.

Stability:≤0.007% /hr.≤0.01 % /8hr,after 1 hour’s warm up

Microchannel Plates Power Supply (Optional )

Output Voltage：ranges from 0~1500Vdc，

Output current：0~1000uA.

Load Regulation：0.001% (from no load to full load).

Line Regulation：±0.001%(Input Voltage changes 10%).

Ripple：≤0.001%.

Temperature Coefficient：25ppm/℃.

Stability：≤0.007% /hr.≤0.01% /8hr,after 1 hour’s warm up