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Stochastic cooling notch filter developments for the high-precision spectrometer ring in the high intensity heavy-ion
Guangyu Zhu1,2, Junxia Wu1,2, Jia Yin1
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
The Review of Scientific Instruments
|September 22, 2023
Summary
New notch filters enhance stochastic cooling for high-intensity heavy-ion accelerator projects. These filters improve ion beam cooling efficiency for radioactive fragment beam experiments at the Spectrometer Ring (SRing).
Area of Science:
- Accelerator Physics
- Beam Dynamics
- Instrumentation
Background:
- The High Intensity Heavy-Ion Accelerator Facility (HIAF) project requires efficient ion beam cooling for experiments.
- Stochastic cooling is crucial for improving beam quality in storage rings like the Spectrometer Ring (SRing).
- Existing stochastic cooling systems can benefit from improved filter technologies.
Purpose of the Study:
- To develop and evaluate novel notch filter designs for the SRing stochastic cooling system.
- To assess the performance of coaxial and optical-type notch filters for ion beam cooling.
- To explore potential applications of these filters in beam feedback systems.
Main Methods:
- Fabrication and testing of prototype coaxial-type notch filters with amplitude equalizers.
- Fabrication and testing of prototype optical-type notch filters with phase-stabilized optical fiber.
- Measurement of notch depth and performance evaluation of both filter types.
Main Results:
- Coaxial notch filters achieved a minimum notch depth of 26 dB.
- Optical notch filters achieved a minimum notch depth of 40 dB.
- Both filter prototypes demonstrated effective performance for stochastic cooling applications.
Conclusions:
- The developed coaxial and optical notch filters are suitable for the SRing stochastic cooling system.
- These filters significantly improve the stochastic cooling process for stored ion beams.
- The technology shows promise for future applications in beam feedback systems and other accelerator facilities.
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