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Canon E3730A Operating Instructions Manual

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CANON ELECTRON TUBES
& DEVICES CO., LTD.
* We are appreciating your purchase of our klystron product.
* Please read carefully this instruction manual before operating the klystron tube
to use it properly.
* Please keep this instruction manual carefully not to lose.
★The information contained herein is presented only as a guide for the application of our products. No responsibility is assumed by Canon Electron Tubes
& Devices Co., Ltd. (CETD) for any infringements of patents or other rights of the third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of CETD or others.
★The information contained herein may be changed without prior notice. It is therefore, advisable to contact to CETD before processing with the design of
equipment incorporating this product.
High Power Pulse Klystron
E3730A
Operating Instructions
Aug, 2020
CANON ELECTRON TUBES & DEVICES CO., LTD.
Engineering Information
No. EE-E3730A 2020-08-04
EI

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Summary of Contents for Canon E3730A

  • Page 1 CANON ELECTRON TUBES & DEVICES CO., LTD. ★The information contained herein is presented only as a guide for the application of our products. No responsibility is assumed by Canon Electron Tubes & Devices Co., Ltd. (CETD) for any infringements of patents or other rights of the third parties which may result from its use.

  • Page 2: Table Of Contents

    E3730A OPERATING INSTRUCTIONS Contents 1. Safety Precautions ・・・・・・・・・・・・・・・・・・・・2 2. Each Part Name of Klystron Tube・・・・・・・・・・・・・・7 3. Marking Labels ・・・・・・・・・・・・・・・・・・・・・・8 4. Structure and Theory of the Operation・・・・・・・・・・・9 5. Related Device and Notes ・・・・・・・・・・・・・・・・・12 6. Explanation of Operation and Maintenance ・・・・・・・・・15 7. Inquiries・・・・・・・・・・・・・・・・・・・・・・・・・19...

  • Page 3: Safety Precautions ・・・・・・・・・・・・・・・・・・・・2

    This electron tube is intended and designed for use in combination with amplifier for industrial devices and scientific equipment. If this electron tube is to be used with equipment other than the above, contact CANON ELECTRON TUBES & DEVICES CO., LTD. (CETD) in advance. CETD will not be held responsible for malfunction or damage caused by the use of this electron tube in applications other than those specified without prior approval.
  • Page 4 E3730A OPERATING INSTRUCTIONS [Manufacturing equipment, warning indications for equipment, use of the electron tube] (1) All equipment incorporating this electron tube must be equipped with safety mechanisms as described below. (2) All equipment incorporating this electron tube and their operations manual must include the warning indications described below to ensure safe operation of the electron tube.
  • Page 5 E3730A OPERATING INSTRUCTIONS WARNING An electron tube with a tube voltage of more than 10 kV will generate X-rays. X-ray generation increases as the voltage and current are increased. (1) Perform thorough evaluation for X-ray leakage for the equipment used in combination with this electron tube.
  • Page 6 E3730A OPERATING INSTRUCTIONS CAUTION Weight of this electron tube is about 35 kg. Be careful when handling this electron tube because it is very heavy. Be extremely careful to ensure safety when shifting, moving, or installing this electron (Weight) tube.
  • Page 7 E3730A OPERATING INSTRUCTIONS Fig.1 Explanation diagram concerning safety Danger Electromagnetic wave Do not operate the klystron tube with the output waveguide disconnected. Output power of high frequency is about 7.5 MW and it can cause death or serious injury. Danger...

  • Page 8: Each Part Name Of Klystron Tube・・・・・・・・・・・・・・7

    E3730A OPERATING INSTRUCTIONS 2. EACH PART NAME OF KLYSTRON TUBE Collector Section Body Section Electron Gun Section － 7 －...

  • Page 9: Marking Labels ・・・・・・・・・・・・・・・・・・・・・・8

    E3730A OPERATING INSTRUCTIONS 3. Marking labels (1) Caution labels (Collector side) Dimension : 125 x 95 mm Material : Aluminum film (2) Caution label (Terminal for the ion pump power supply) Dimension : 63 x 32 mm Material : Aluminum film...

  • Page 10: Structure And Theory Of The Operation・・・・・・・・・・・9

    E3730A OPERATING INSTRUCTIONS 4. Structure and theory of operation 4.1 Theory of operation A high-power klystron with multi cavities consists of an electron gun, interaction cavities for Radio Frequency (RF), a collector, an output window and an ion pump. At the electron gun section, a heated cathode emits electrons and high voltage which is applied between the cathode and an anode generates an electron flow called an electron beam.
  • Page 11 E3730A is a high-power pulsed klystron especially designed to be used as a high-power microwave source for a linear accelerator. E3730A can deliver peak output power of 50 MW with a pulse width of 4.0 micro-seconds at frequency of 2856MHz. The focusing magnet of VT-68922 is available.
  • Page 12 E3730A OPERATING INSTRUCTIONS Peak drive power 400 W typ. Efficiency 40% min. Heater voltage 17 V typ. Heater current 18 A typ. 4.3.4 Absolute ratings Parameters Symbol Units Max. Min. Frequency 2857 2855 Heater voltage Heater current Heater current (surge)

  • Page 13: Related Device And Notes ・・・・・・・・・・・・・・・・・12

    5.1 Accessories E3730A includes following accessories. Magnet for the ion pump 5.2 Related devices The following devices are needed to operate E3730A besides the accessories. Focusing magnet VT-68922 (Optional) X-ray shielding kit VT-69064 (Optional) Ion pump power supply and cable (Optional) 5.2.1 Devices necessary for installation...
  • Page 14 Particle-matter size max. 50 µm (325 mesh) 5.3 Operating hazards E3730A is a klystron operated with high output power and high voltage. Therefore, please note the following points for safety and protection of the tube. 5.3.1 High voltage This tube operates at high voltage. So that, equipments, electromagnet and klystron must be designed so that personnel cannot come in contact with operation voltages.
  • Page 15 E3730A OPERATING INSTRUCTIONS and can result in blindness or other injury. Personnel must be fully protected from the microwave energy which radiates from this device. All input and output RF connections, waveguide flanges, and gaskets must be RF leak proof and properly engaged. Never operate this device without a microwave-energy-absorbing load.
  • Page 16 Medium Speed - Have a high velocity with about 100 ms High Speed - Activate as fast within 30 ms（possibly next pulse will not be applied） 6. OPERATING AND MAINTENANCE INSTRUCTIONS 6.1. Installing an E3730A klystron 6.1.1. General 6.1.1.1. Equipment-room preparation Installation of the klystron requires the use of an appropriate handling system.
  • Page 17 E3730A OPERATING INSTRUCTIONS During handling, the protective covers for output window must be left on the tube. Be careful not to apply any pressure or shock on the tube. The klystron is designed to be supported at the collector shielding bracket or the collector pole-piece. Ceramic-metal seals at the electron gun assembly are the most vulnerable part of the klystron.
  • Page 18 Helium leak detector. 6.1.3.7. Evacuate the waveguide The E3730A klystron must not be operated at the output waveguide pressure higher than Pa (10 torr). It is recommended the output waveguide pressure is kept at less than or equal to 2.6x10...
  • Page 19 Please call immediately Electron Tube Division. 6.1.4.2. Output waveguide vacuum The E3730A klystron is designed with waveguides evacuated to less than 1.3x10 Pa (10 torr). Check the evacuating system is in normal operation and the vacuum gauge is correctly operating.
  • Page 20 When starting a new station waveguides or dummy load, careful conditioning of the waveguide system is necessary. The E3730A klystron is designed to operate with output waveguide system, in which ultra-high vacuum is kept even during RF power is on.
  • Page 21 E3730A OPERATING INSTRUCTIONS Check the ultimate pressure in the waveguide system is less than 1.3x10 Pa (10 torr), and evacuating speed of the vacuum pump and pumping conductance of the vacuum channel is large enough to keep the waveguide pressure at the klystron output window less than 1.3x10 torr) even in the full power operation.
  • Page 22 E3730A OPERATING INSTRUCTIONS damage by arcing is accumulated to a particular part of electrodes. As the E3730A klystron produces very high output power, the PFN energy is dangerously high enough to give serious damage to the electron gun electrodes with a very small number of successive arcing.
  • Page 23 E3730A OPERATING INSTRUCTIONS In case of SF gas pressurization, make sure the pressure gauge is in normal operation range. Electromagnet temperature Check the electromagnet water flow is in normal range. Check the focus coil current is in normal operation range.
  • Page 24 E3730A OPERATING INSTRUCTIONS ceramics. The electron gun assembly must be sealed with a plastic cover preventing the insulating ceramics from stains. Because of the size of this tube, it is not abnormal to observe changes in the internal vacuum during storage. To be able to put the stored klystron into operation quickly, the klystron ion pump shall be operated all the time.

  • Page 25: Inquiries・・・・・・・・・・・・・・・・・・・・・・・・・19

    E3730A OPERATING INSTRUCTIONS 7. Inquiries For further information, please contact CETD at following address. CANON ELECTRON TUBES & DEVICES CO., LTD 1385, SHIMOISHIGAMI, OHTAWARA-City, TOCHIGI-Ken, 324-8550 JAPAN PHONE: +81-287-26-6345 FAX: +81-287-26-6060 Overseas sales agents and sales company For Sales & Technical Services, please contact the following representative: ・SUMITOMO DEUTSCHLAND GMBH...