Model 2594 | Electron Beam, Ion Beam, X-Ray Tube Power Supply

• Very low output ripple (<300 mV p-p at full load at 50 kV and 500 uA)
• Temperature coefficient <50 ppm/°C
• Stored energy is low (<0.25 J at 30 kV)
• Separate connection for HV output cable shield and programming reference
• Over voltage and over current limited
• Short-circuit and arc protected(<10ppm/hr) and tempco (<10 ppm/°C)
• Automatic output voltage recovery after arcs and short circuits
• Floating high voltage return available

Model 2594 is a high-stability power supply designed for the difficult requirements of focused ion and electron beam systems. It features low ripple and low stored energy. The low stored energy at the output reduces system upsets when arcing occurs. The low output ripple is the result of using sine wave excitation to the high voltage multiplier plus the use of a novel ripple cancellation circuit. Hence, low output ripple is achieved without using a large value output capacitor. The 2594 uses separate power return lines for the high voltage load, the input power and the voltage programming reference. Separating these signals reduces unwanted interactions between the critical programming reference and the other circuits. It also allows to reduce the 60 Hz noise resulting from AC line power input.