Proton heavy ion-beam-flow vertical beam bunch shape measurement detector

Abstract

The invention relates to the accelerator beam flow diagnosis, beam flow measurement, and vertical beam bunch shape measurement field and especially relates to a proton heavy ion-beam-flow vertical beam bunch shape measurement detector. The detector comprises a detector main body and a microwave band shape line structure arranged on the detector main body. The detector main body comprises a flange. A tantalum copper composite board is connected to the flange through a support frame. A water cooling pipe is arranged between the flange and the tantalum copper composite board. The microwave band shape line structure is arranged on an inner side of the tantalum copper composite board. The microwave band shape line structure is fixed to a microwave band shape line bottom plate. Adaptors are arranged above and below the microwave band shape line structure respectively. The microwave band shape line structure comprises a medium substrate. Upper layer ground and lower layer ground are arranged above and below the medium substrate respectively. The medium substrate is provided with a positioning hole, a first metallization through hole and a second metallization through hole. A band shape line conduction band and a microstrip line conduction band are arranged on the medium substrate. The structure is compact, processing and operation control are easy to achieve, time resolution is high and anti-interference performance is high.

Description

technical field [0001] The invention relates to the technical fields of accelerator beam current diagnosis, beam current measurement and longitudinal cluster shape measurement, in particular to a proton heavy ion beam longitudinal cluster shape measurement detector. Background technique [0002] As the eyes of the accelerator, the beam diagnosis system is one of its important systems. The beam transmission and the determination of the performance and parameters of the accelerator are monitored through the measurement of the beam parameters by the beam diagnosis system. Necessary means of matching. Accelerator laboratories both at home and abroad attach great importance to the beam current testing system and its application research. Among them, the shape of the longitudinal bunch is one of the important parameters to measure the quality of the beam. Through the measurement of the length of the longitudinal bunch, the longitudinal emissivity of the beam can be calculated, th...

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Problems solved by technology

[0003] A literature search of the prior art found that the hash neutron source of the Oak Ridge National Laboratory (ORNL) used the sum signal of BPM to measure the length of the longitudinal bundle satisfying the Gaussian distribution, but the BPM was inaccurate in measuring the length of the longitudinal bundle at low energy. The disadvantage of group length; the German Heavy Ion Institute (GSI) reported in 2013 that the secondary electrons generated by the interaction between the residual gas and the beam are accelerated by an external high-voltage electric field, and then the secondary electrons are confined by an electrostatic energy analyzer and a radio frequency deflection system. The shape of the bunches is finally measured through the horizontal and vertical directions of sub-electrons, but its structure has the disadvantages of complex structure and high cost; (4), in the paper "Using 20GHz Digital Sampling Oscilloscope to Measure the Bunch Length" published on P368-371, the electrical measurement method based on the strip monitor successfully measured the bundle of the Hefei 800MeV electronic storage ring with a current intensity of 2mA. 300-800ps FWHM, this method is mainly designed for electron beams, and similar to the BPM measurement method, it has the disadvantage of being inaccurate in measuring the length of the longitudinal bundle at low energy

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