大型科学仪器中的数字孪生.pptx

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1、Digital Twins in Large Scale Scientific Instruments:Improving Particle Accelerator Performance and Operation,Weijian(Lucy)LinCollider Accelerator Department,BNLNew York Scientific Data Summit 2024September 17,2024,Motivation,2,Particle accelerator kilometer-scale machine with thousands of coupled co

2、mponents to generate and preserve beam with very precisely defined qualities(e.g.,energy,emittance,luminosity etc.)Traditionally maintained with many hours of manual tuning,taking time away from data collectionConstantly varying complex system no constant set of routine,needs real-time adjustments,3

3、,Alternating Gradient Synchrotron(AGS)and its Booster serve as part of the injector compound for RHIC and future EIC,Motivation,Loss in polarization along the chain,Difficulty in improving beam quality:polarimeter measurement is slow and has big error barstuning is an empirical process,due to the la

4、ck of accurate models for the machines,Digital Twin can be used to optimize beam luminosity,quality,and polarization in RHIC and EIC,Digital twin at CBETA,4,Multi-turn energy recovery linac(ERL)developed by BNL and CornellHad success in building digital-twins for CBETA:combine physics simulation mod

5、el with EPICS control systemCBETA-V:measure beam trajectories and compare to the digital twin in real time on control-system screens,5,Improve Accelerator Operations with DT,Figure-of-merits(FOM)for machine learning(ML)algorithms(“experimental outputs”):beam position,beam size,emittance,beam intensi

6、ty,polarizationreal measurements can be expensiveImproved modeling Digital TwinDigital twin can be used for:fast real-time predictions for operatorserror detection and correctionoffline development of optimization and tuning routines,Automatic orbit correction,6,Traditional orbit correctionobtain ma