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Facilities for 9-cell Nb cavities

Facilities for 9-cell Nb cavities. (1) A standard ultrasonic cleaner “SONO SW30H”.

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Facilities for 9-cell Nb cavities

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  1. Facilities for 9-cell Nb cavities

  2. (1) A standard ultrasonic cleaner “SONO SW30H” The cleaner with inside container dimension of 505L*300W*200H is bought, its vibrator frequency is 38kHz, ultrasonic power is 300W, it is used to wash half cell, dumbbell , stiffen ring, beam tube and so on in clean room.

  3. （2）Frequency measuring device for half cell and dumbbell By calculation, the relation of the frequency depend on the length of iris and equator linear section can be obtained. so during edge cutting, we can determine how many length of iris and equator will be cut for each half cell and dumbbell. This require a frequency measuring device should be of several kHz frequency stability and good measurement repeatability. 1、Half cell 1/2pi mode calculation 2、Dumbbell pi mode calculation

  4. finger contact with soft rubber sealing support （2）frequency measuring device for half cell and dumbbell (con’t) A special frequency measuring device with finger contact is designed to measure the frequency. The mode’s Q value can reach more than 3000, the stability of frequency is low than 1kHz. 1、Half cell 1/2pi mode measurement 2、Dumbbell 1/2pi and pi mode measurement

  5. （3）Vacuum container with Teflon clamper for dumbbell and end cell transportations and CBP

  6. （4）HPR device A HPR device had been designed, now it’s just under parts fabrication. A THK type guide with 1510mm effective moving range is chosen, and a oriental motor with center hole of 20mm is adopted. The 9-cell cavity is hanged on top plate support, nozzle pipe move up and down with the speed of 0.5 to 5 minute per turn along the guide, also the nozzle rotate with the speed of 0.4 to 20 rpm. Since this device is not only used for 9-cell 1.3GHz cavity, also it can serve for BEPCII 500 MHz cavity.

  7. （4）HPR device (con’t) Two special design for nozzle and guide water-proof structure.

  8. （5）Ultrasonic cleaner A custom-designed ultrasonic rinsing tank will be fabricated to satisfy the rinsing requirements of the 9-cell 1.3 GHz and 500MHz cavity. During washing period, the cavity can move along the guide which is same as HPR used one. In order to choose the ultrasonic machine parameter, I send a email to Hayano-san to inquire the design parameter of STF one. Refer STF design, we choose the tank inside size is 650mm*850mm*1500mm(height), but four vibrator put in both side of tank, the effective space is reduced to about 650mm*650mm*1500mm, the heater power is 6kW, that means it need 6 hour to warm up whole tank water 20 degree higher. The vibration power is 8 kW, each vibrator is 2 kW. Oscillation frequency choose 40 kHz.

  9. （5）Ultrasonic rinsing device (con’t) Sender：Hitoshi HayanoSend Time：2009-08-22 11:13:37Title：Re: Inquire the parameters of Ultrasonic Rinsing DeviceDear Li Zhongquan,The answer of your question regarding ultra-sonic rinse system of STF, is as follows;The design and production company: Nomura plating co.Used component for ultra-sonic: ScanRex(r), Sansha-Denki : http://www.sansha.co.jp/product: Clean Rex S-4060E (total 8 units in the tank, 4 unit in X plane and 4 units in Y plane)the detail of the specification is not in my hand (maybe somewhere in STF, I could not find so far)maybe, 40kHz, 600W is put into 300 x 300 x 100 (roughly) ultrasonic vibrator. normal operation is in max power for 8 units.Water tank : 1000 x 1000 x 2000(depth) with 5kW heater and water circulating pump. normal operatingtemperature is 50 degree.Cavity is put into this water tank in the center with independent UPW overflow inside of cavity. All the time cavity is hung in the tank by outside crane.Nominal operation time duration is around 1 hour.By our recent study, sulfur on the cavity surface can be removed by ethanol filled in and ultra-sonic, or by detergent filled in and ultra-sonic. So you need to think about to use these fluid for ultrasonic rinsing. I write on 2009.08.16Dear Prof. Hayano,I'm Zhongquan Li from IHEP CHINA, Last time you visit our institute, I inquire some information about ultrasonic rinsing equipment for your 9-cell Nb cavity. Now I'm responsible for design of our ultrasonic rinsing device, we want to refer your design, can you tell me some parameter, such as frequency, power, heater power, and vessel dimensions.

  10. （6）Vertical pretuning device after taking 6 time pretuning, the field flatness had reached 97.8%.

  11. （6）Vertical pretuning device (con’t) 1、A Labview program control the step motor and network analyzer to start up synchronously, also it download and record the phase data from network analyzer after phase sweeping. 2、A Java program calculate the frequency error of each cell respect to target setting frequency, also it calculate the flatness for this turn measurement.

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