For example: Agilent E4440A or Anritsu 68369
Glassman DC Power Supplies
Glassman ER1.5R200
1.5kV, 200mA, 300 Watt Regulated High Voltage DC Power Supply
Manufacturer: Glassman
Glassman ER40N7.5
40kV, 7.5mA, 300 Watt Regulated High Voltage DC Power Supply
Manufacturer: Glassman
Glassman ER40P7.5
40kV, 7.5mA, 300 Watt Regulated High Voltage DC Power Supply
Manufacturer: Glassman