MG6090 Tunable S-Band Magnetron

The Thomson-CSF MG6090 is a tunable S-band pulse magnetron designed for LINAC use in Siemens, Varian Unique, and Radixact linear accelerators. It offers a peak output power of 3 MW and a mechanically tunable frequency range from 2993 to 3002 MHz.

Varian Part Number: 10001301301

Equivalent Replacement for E2V Teledyne MG6090 Tunable S-Band Magnetron

2. Electrical Specifications

• Frequency Range: 2993 to 3002 MHz
• Peak Output Power: 3 MW
• Anode Voltage (peak): 52 kV (typical)
• Anode Current (peak): 102 A (typical)
• Pulse Duration: 4.3 μs (typical)
• Pulse Repetition Rate: 50 to 405 p.p.s (typical)
• Rate of Rise of Voltage Pulse: 120 kV/μs (typical)
• Cathode: Indirectly heated
  • Heater Voltage: 14 Vdc
  • Heater Current (at 14 V): 8.0 A
  • Maximum Heater Starting Current: 20 A
  • Cathode Pre-heating Time: 10 minutes

3. Mechanical Specifications

• Overall Dimensions: Refer to dimensional data provided (page 5 of the product information)
• Net Weight: 8.6 kg (approx.)   
  
  
• Tuner Revolutions to Cover Frequency Range: 5.75
• Mounting Position: Any
• Output Coupling: #10 Waveguide (72.14 x 34.04 mm internal)

4. Cooling Requirements

• Anode Cooling: Water
  • Flow Rate: 5 L/min
  • Pressure Drop at 5 L/min: 1.25 kg/cm²
  • Maximum Outlet Temperature: 50°C
• Cathode Cooling: Air
  • Cathode Air Flow: 0.28 m³/min
• Magnet: External (north seeking pole face adjacent to magnetron anode face)

5. Operating Conditions

• Magnetic Field: 165.0 to 242.5 ± 10 mT
• Waveguide Pressure: 3.1 kg/cm² gauge (maximum)
• VSWR at the Output Coupler: 1.5:1 (maximum)

6. Test Conditions and Limits

• Test Conditions:
  • Magnetic Field: 160.0 ± 0.5 mT
  • Heater Voltage (for test): 0 V
  • Anode Current (peak): 115 A
  • Pulse Repetition Rate: 200 p.p.s
  • Pulse Duration: 5.0 μs
  • VSWR at the Output Coupler: 1.1:1
  • Rate of Rise of Voltage Pulse: 120 kV/μs
• Limits:
  • Anode Voltage (peak): 46 to 52 kV
  • Output Power (peak): 3.0 MW (minimum)
  • Lower Limit of Tuning Range: 2993 MHz
  • Upper Limit of Tuning Range: 3002 MHz
  • RF Bandwidth (1⁄4 Power): 1.2 MHz
  • Frequency Pulling (VSWR not less than 1.5:1): 7.0 MHz
  • Stability: 0.5%
  • Heater Current: Refer to Note 13 (7.0 A min, 9.0 A max with 14 Vdc heater voltage and no anode input power)

7. Important Notes

• It is recommended to use a DC power supply for the heater to avoid damage.
• The heater voltage must be reduced within 5 seconds after applying high voltage, according to the schedule provided (page 4 of the product information).
• The magnetron heater requires protection against arcing using a capacitance of at least 4000 pF across the heater input terminals.
• An isolator is recommended to isolate the magnetron from the load.
• Refer to the product information for detailed dimensional data, heater voltage reduction schedule, and recommended parameters for various power levels.

8. Safety Precautions

• This product utilizes high voltages and should only be operated by qualified personnel.
• Follow all safety guidelines and precautions outlined in the product information.

This product specification provides a summary of the key features and specifications of the Thomson-CSF MG6090 magnetron. For comprehensive information and operational details, please request a data sheet.