S94604E Magnetron Large Power Magnetron - For Industrial Applications l Ceramic-Metal Construction l 66kW l All Magnetron Support Equipment Available The BURLE S94604E is a fixed-tuned, magnetically- focused, air- and liquid-cooled, ceramic-metal magnetron designed for industrial processing applications. It can continuously generate 66 kilowatts of useful power at 915 MHz with very high efficiency. In operation, the tube must be protected against a mis-matched load by a circulator located between the waveguide transition and the load. Several accessories necessary for the safe installation and operation of the S94604E are available from BURLE INDUSTRIES, INC. and are listed on page 2. Instructions contained in the following publications will help to assure longer tube life, safer operation, less downtime, and fewer tube handling accidents. TP-116 Application Guide for BURLE Large Power Magnetrons. TP-118 Application Guide for Forced-Air Cooling of BURLE Power Tubes. TP-105 Application Guide for BURLE Power Tubes. CW Oscillator Maximum Ratings; Absolute-Maximum Values DC Anode Voltage’ ................................................ 19 kV Anode Current ......................................................... 5.0 A Anode Dissipation ................................................. 15 kW Load VSWR 2 , 3 .......................................................... 2.0:1 International Standards Organization Registered Firm ISO 9001 Quality System Typical Operation - 915 MHz AC Filament Voltage ............................................... 9.0 v Filament Current 4 ..................................................... 85 A DC Anode Voltage.. ............................................. 16.2 kV Anode Current ......................................................... 4.8 A DC Electromagnet Current! ..................................... 4.4 A Useful Power Output! ............................................ 66 kW Efficiency ................................................................. 85 % General Data Electrical Filament: AC supply voltage .................................................. .12 v Current at 12 volts 4 ............................................... 115 A Starting current.. .... Must NEVER exceed 120 amperes Hot resistance ............................................... 0.104 ohm Minimum heating at nominal voltage ................... 2 min. Center Frequency ......................................... 915 ± 5 MHz Focusing’ .............. Electromagnet (AJ2194 or equivalent) Mechanical Operating Position 7 .. ....................... Vertical, either end up Maximum Overall Length ................ .463.6 mm (18.25 in.) Maximum Diameter ............................ 125.5 mm (4.94 in.) Terminal Connections ............. See Dimensional Outline Weight ....................................................... 7.2 kg (16.0 lb)
Transcript
S94604E
Magnetron
Large Power Magnetron -For Industrial Applications
l Ceramic-Metal Construction
l 66 kW
l All Magnetron Support EquipmentAvailable
The BURLE S94604E is a fixed-tuned, magnetically-focused, air- and liquid-cooled, ceramic-metal magnetrondesigned for industrial processing applications. It cancontinuously generate 66 kilowatts of useful power at915 MHz with very high efficiency. In operation, the tubemust be protected against a mis-matched load by acirculator located between the waveguide transition andthe load. Several accessories necessary for the safeinstallation and operation of the S94604E are availablefrom BURLE INDUSTRIES, INC. and are listed onpage 2.
Instructions contained in the following publications willhelp to assure longer tube life, safer operation, lessdowntime, and fewer tube handling accidents.
TP-116 Application Guide for BURLE Large PowerMagnetrons.
TP-118 Application Guide for Forced-Air Cooling ofBURLE Power Tubes.
DC Anode Voltage’ ................................................ 19 kVAnode Current ......................................................... 5.0 AAnode Dissipation ................................................. 15 kWLoad VSWR2,3 .......................................................... 2.0:1
International Standards OrganizationRegistered Firm ISO 9001 Quality System
Typical Operation - 915 MHz
AC Filament Voltage ............................................... 9.0 vFilament Current4 ..................................................... 85 ADC Anode Voltage.. ............................................. 16.2 kVAnode Current ......................................................... 4.8 ADC Electromagnet Current! ..................................... 4.4 AUseful Power Output! ............................................ 66 kWEfficiency ................................................................. 85 %
General DataElectricalFilament:
AC supply voltage .................................................. .12 vCurrent at 12 volts4 ............................................... 115 AStarting current.. .... Must NEVER exceed 120 amperesHot resistance ............................................... 0.104 ohmMinimum heating at nominal voltage ................... 2 min.
Center Frequency ......................................... 915 ± 5 MHzFocusing’ .............. Electromagnet (AJ2194 or equivalent)
Mechanical
Operating Position7.. ....................... Vertical, either end upMaximum Overall Length ................ .463.6 mm (18.25 in.)Maximum Diameter ............................ 125.5 mm (4.94 in.)Terminal Connections ............. See Dimensional OutlineWeight ....................................................... 7.2 kg (16.0 lb)
For safe and satisfactory operation of the BURLES94604E Magnetron, BURLE recommends the use ofthe following parts and assemblies:
Tube requires uniform, forced-air cooling of outputceramic dome and of filament-terminal stem. Airflow must start before application of filament voltageand, preferably, continue for several minutes aftervoltage removal. Interlock filament power supply withair flow to prevent tube damage due to inadequateair flow.
Output Dome Cooling (with AJ2192): 0.012meters3/sec. (25 cfm) at 100 mm (4 inches) of water.
Filament Terminal Cooling (AJ2137V1): 0.0048mefers3/sec. (10 cfm) at 203 mm (8 inches) of water.
Liquid Cooling:Tube anode requires liquid cooling. Liquid flow muststart before application of filament voltage and,preferably, continue for several minutes afterremoving voltage. Interlock filament power supplywith liquid flow to prevent tube damage due toinadequate liquid flow. When liquid is water, use ofdistilled or filtered deionized water is essential.
BURLE Type Number DescriptionAJ2135 Magnetic Pole PieceAJ2136V2 Filament-Cathode ConnectorAJ2137V1 Filament ConnectorAJ2138 RF GasketAJ2192 Waveguide TransitionAJ2194 Electromagnet
One unit of each of the recommended parts andassemblies is required for the proper operation of aS94604E. All items except the RF gasket may be used inthe subsequent installation of replacement tubes. DoNOT reuse RF gaskets. Keep several on hand forpossible use in reinstalling tubes.
Warning - Personal Safety Hazards
Nominal Water Flow
Radio Frequency Radiation - This device, inoperation, produces radio frequency radiation whichmay be harmful to persons.
2. A circulator MUST be incorporated between waveguide transitionand load to protect the magnetron from high reflected power.
Thermal - This device may have exposed surfacesheated to high temperatures during operation creatingthermal hazards. Touching these surfaces during orimmediately following operation can cause burns.Sufficient time for cool down should be allowed beforehandling.
3. Monitor the load VSWR using the signal detected to actuate aninterlock system capable of removing anode voltage from thetube less than 10 milliseconds after a fault occurs.
X-Ray Warning - This device, in operation, canproduce x-rays which may constitute a health hazardunless the device is adequately shielded for radiation.
4. The filament is subjected to back-bombardment during tubeoperation. Back-bombardment increases filament temperatureand shortens tube life if left uncorrected. Therefore, duringoperation, filament current should be reduced to a value that willgive the same “hot filament resistance” as when no power isbeing generated.
Filament voltage and current characteristics differ slightly fromtube to tube. Each magnetron is shipped with a test data sheetgiving the specific filament characteristics for that tube. Alwaysadhere to this data for best tube life.
High Voltage - Although the user of this product isnormally protected from the high voltage hazard bythe equipment design, the voltages applied to this unitin normal operation are hazardous. High voltagesafety precautions must be followed. Equipmentcaution. labels and safety features must not bedisregarded.
5. The magnetic field must be turned “on” before application ofanode voltage and turned “off’ only after removal of anodevoltage. Refer to publication TP-116 “Application Guide forBURLE Large Power Magnetrons” for further details.
6. At a load VSWR not exceeding 1.1:1.
7. Mounting the magnetron with filament connector UP, outputceramic dome DOWN, permits convenient installation of the tubeand helps to assure good RF contact between the tube’s outputterminal contact surface, the RF gasket, and the electromagnet.The tube will operate satisfactorily with the output ceramic domeUP but is less convenient to install in that position.
Dimensions in millimeters. Dimensions in parentheses are in inches.
Note 1: Recommended direction of anode current flow: Duct No.2 is “IN” and Duct No.1 is “OUT” when tube is operated with Output CeramicDome DOWN. With Output Ceramic Dome UP, the flow should be reversed.
