Publications

Bayesian optimization algorithms for accelerator physics
Roussel, R.; Edelen, A. L.; Boltz, T.; Kennedy, D.; Zhang, Z.; Ji, F.; Huang, X.; Ratner, D.; Garcia, A. S.; Xu, C.; Kaiser, J.; Pousa, A. F.; Eichler, A.; Lübsen, J. O.; Isenberg, N. M.; Gao, Y.; Kuklev, N.; Martinez, J.; Mustapha, B.; Kain, V.; Mayes, C.; Lin, W.; Liuzzo, S. M.; St. John, J.; Streeter, M. J. V.; Lehe, R.; Neiswanger, W.
2024. Physical Review Accelerators and Beams, 27 (8), Art.-Nr.: 084801. doi:10.1103/PhysRevAccelBeams.27.084801  

Reinforcement learning-trained optimisers and Bayesian optimisation for online particle accelerator tuning
Kaiser, J.; Xu, C.; Eichler, A.; Santamaria Garcia, A.; Stein, O.; Bründermann, E.; Kuropka, W.; Dinter, H.; Mayet, F.; Vinatier, T.; Burkart, F.; Schlarb, H.
2024. Scientific Reports, 14 (1), Artkl.Nr.: 15733. doi:10.1038/s41598-024-66263-y  

Bridging the gap between machine learning and particle accelerator physics with high-speed, differentiable simulations
Kaiser, J.; Xu, C.; Eichler, A.; Santamaria Garcia, A.
2024. Physical Review Accelerators and Beams, 27 (5), Art.-Nr.: 054601. doi:10.1103/PhysRevAccelBeams.27.054601  

Towards few-shot reinforcement learning in particle accelerator control
Hirlaender, S.; Lamminger, L.; Pochaba, S.; Santamaria Garcia, A.; Xu, C.; Scomparin, L.; Kaiser, J.; Kain, V.
2024. 15th International Particle Accelerator Conference, Nashville, Tennessee : May 19-24, 2024, Nashville, Tennessee, USA : proceedings. Ed.: F. Pilat, 1804–1807, JACoW Publishing. doi:10.18429/JACoW-IPAC2024-TUPS60  

The reinforcement learning for autonomous accelerators collaboration
Santamaria Garcia, A.; Xu, C.; Scomparin, L.; Eichler, A.; Kaiser, J.; Schenk, M.; Pochaba, S.; Hirlaender, S.
2024. 15th International Particle Accelerator Conference, Nashville, Tennessee : May 19-24, 2024, Nashville, Tennessee, USA : proceedings. Ed.: F. Pilat, 1812–1815, JACoW Publishing. doi:10.18429/jacow-ipac2024-tups62  

Preliminary results on the reinforcement learning-based control of the microbunching instability
Scomparin, L.; Santamaria Garcia, A.; Kopmann, A.; Mueller, A.-S.; Xu, C.; Blomley, E.; Bründermann, E.; Steinmann, J. L.; Becker, J.; Schuh, M.; Schuh, M.; Caselle, M.; Dritschler, T.; Mochibashi, A.; Weber, M.
2024. 15th International Particle Accelerator Conference, Nashville, Tennessee : May 19-24, 2024, Nashville, Tennessee, USA : proceedings. Ed.: F. Pilat, 1808–1811, JACoW Publishing. doi:10.18429/JACoW-IPAC2024-TUPS61  

Microsecond-Latency Feedback at a Particle Accelerator by Online Reinforcement Learning on Hardware
Scomparin, L.; Caselle, M.; Garcia, A. S.; Xu, C.; Blomley, E.; Dritschler, T.; Mochihashi, A.; Schuh, M.; Steinmann, J. L.; Bründermann, E.; Kopmann, A.; Becker, J.; Müller, A.-S.; Weber, M.
2024. arxiv. doi:10.48550/arXiv.2409.16177  

Cheetah: Bridging the Gap Between Machine Learning and Particle Accelerator Physics with High-Speed, Differentiable Simulations
Kaiser, J.; Xu, C.; Eichler, A.; Garcia, A. S.
2024. arxiv. doi:10.48550/arXiv.2401.05815  

Reinforcement Learning-trained Optimisers and Bayesian Optimisation for Online Continuous Tuning
Kaiser, J.; Xu, C.; Eichler, A.; Garcia, A. S.; Stein, O.; Bründermann, E.; Kuropka, W.; Dinter, H.; Mayet, F.; Vinatier, T.; Burkart, F.; Schlarb, H.
2024, March 5. 4th ICFA Beam Dynamics Mini-Workshop on Machine Learning Applications for Particle Accelerators (ICFA 2024), Gyeongju, South Korea, March 5–8, 2024 

Utilizing differentiable beam dynamics code for simulated optimization
Xu, C.; Santamaria Garcia, A.; Bründermann, E.; Müller, A.-S.
2024, July 5. 12th MT Accelerator Research and Development ST3 Meeting (MT ARD ST3 2024), Darmstadt, Germany, July 3–5, 2024 

Breakthrough in real-time Control with reinforcement learning on hardware at KARA
Santamaria Garcia, A.; Scomparin, L.; Blomley, E.; Bründermann, E.; Caselle, M.; Kopmann, A.; Steinmann, J. L.; Xu, C.; Becker, J.; Müller, A. S.
2024, February 5. 2. Collaboration Workshop on Reinforcement Learning for Autonomous Accelerators (RL4AA 2024), Salzburg, Austria, February 5–7, 2024  

Research Data Management and Data Flow in ROCK-IT
Widmann, C.; Amersdorfer, M.; Biniyaminov, V.; Bründermann, E.; Doronkin, D.; Gethmann, J.; Grunwaldt, J. D.; Kolli, S. K.; Santamaria Garcia, A.; Sapronov, A.; Weidler, P.; Xu, C.; Zimina, A. V.; Müller, A.-S.
2024, May. 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, USA, May 19–24, 2024 

Bayesian optimization of the beam injection process into a storage ring
Xu, C.; Boltz, T.; Mochihashi, A.; Santamaria Garcia, A.; Schuh, M.; Müller, A.-S.
2023. Physical Review Accelerators and Beams, 26 (3), Artkl.Nr.: 034601. doi:10.1103/PhysRevAccelBeams.26.034601  

Integration of an Optimizer Framework into the Control System at KARA
Xu, C.; Blomley, E.; Müller, A.-S.; Santamaria Garcia, A.; Zhang, M.
2023. V. R. W. Schaa, A. Götz, J. Venter, K. White, M. Robichon & V. Rowland (Eds.), Proceedings of ICALEPCS2023, Cape Town, South Africa, 7th-13th October 2023, 570–574, Joint Accelerator Conferences Website Publishing (JACoW). doi:10.18429/JACoW-ICALEPCS2023-TUPDP030  

Bayesian Optimization for SASE Tuning at the European XFEL
Santamaria Garcia, A.; Xu, C.; Bründermann, E.; Mueller, A.-S.; Tomin, S.
2023. R. Assmann, P. McIntosh, A. Fabris, G. Bisoffi, I. Andrian & G. Vinicola (Eds.), 14th International Particle Accelerator Conference, Venedig, 07th -12th May 2023, 4483–4486, JACoW Publishing. doi:10.18429/JACoW-IPAC2023-THPL028  

Beam trajectory control with lattice-agnostic reinforcement learning
Xu, C.; Bründermann, E.; Mueller, A.-S.; Santamaria Garcia, A.; Kaiser, J.; Eichler, A.
2023. R. Assmann, P. McIntosh, A. Fabris, G. Bisoffi, I. Andrian & G. Vinicola (Eds.), 14th International Particle Accelerator Conference, Venedig, 7th-12th May 2023, 4487–4490, JACoW Publishing. doi:10.18429/JACoW-IPAC2023-THPL029  

Learning to Do or Learning While Doing: Reinforcement Learning and Bayesian Optimisation for Online Continuous Tuning
Kaiser, J.; Xu, C.; Eichler, A.; Garcia, A. S.; Stein, O.; Bründermann, E.; Kuropka, W.; Dinter, H.; Mayet, F.; Vinatier, T.; Burkart, F.; Schlarb, H.
2023. arxiv. doi:10.48550/arXiv.2306.03739  

Bayesian Optimization Algorithms for Accelerator Physics
Roussel, R.; Edelen, A. L.; Boltz, T.; Kennedy, D.; Zhang, Z.; Huang, X.; Ratner, D.; Garcia, A. S.; Xu, C.; Kaiser, J.; Eichler, A.; Lubsen, J. O.; Isenberg, N. M.; Gao, Y.; Kuklev, N.; Martinez, J.; Mustapha, B.; Kain, V.; Lin, W.; Liuzzo, S. M.; John, J. S.; Streeter, M. J. V.; Lehe, R.; Neiswanger, W.
2023. arxiv. doi:10.48550/arXiv.2312.05667 

Breakthrough in real-time control with reinforcement learning on hardware at KARA
Santamaria Garcia, A.; Scomparin, L.; Blomley, E.; Bründermann, E.; Caselle, M.; Kopmann, A.; Steinmann, J. L.; Xu, C.; Becker, J.; Müller, A. S.
2023, October 11. 9th Annual MT Meeting "Matter and Technologies" (2023), Karlsruhe, Germany, October 9–11, 2023 

Reinforcement Learning Applications at Particle Accelerators
Xu, C.; Kaiser, J.; Santamaria Garcia, A.; Scomparin, L.; Bruendermann, E.; Eichler, A.
2023, July 6. 11th MT-ARD Subtopic 3 Annual Meeting (MT-ARD-ST3 2023), Dresden, Germany, July 5–7, 2023 

Machine Learning activities at KIT
Santamaria Garcia, A.; Blomley, E.; Bründermann, E.; Caselle, M.; Kötter, S.-R.; Scomparin, L.; Steinmann, J.; Xu, C.; Müller, A. S.
2023, July 3. ACCLAIM Meeting (2023), Jena, Germany, July 3–4, 2023 

Transverse and longitudinal modulation of photoinjection pulses at FLUTE
Nabinger, M.; Kötter, S.-R.; Sax, C.; Nasse, M. J.; Schäfer, J.; Widmann, C.; Xu, C.; Müller, A.-S.
2023, April 24. Kick-Off Meeting ErUM-Pro project EVEBUD (2023), Eggenstein-Leopoldshafen, Germany, April 24, 2023 

Beam Trajectory Control with Lattice-Agnostic Reinforcement Learning
Xu, C.; Bründermann, E.; Kaiser, J.; Müller, A. S.; Santamaria Garcia, A.
2023, March 22. DPG Frühjahrstagung, Arbeitskreis Beschleunigerphysik (2023), Dresden, Germany, March 20–24, 2023 

Highlights & news from KIT
Santamaria Garcia, A.; Bruendermann, E.; Kötter, S.-R.; Scomparin, L.; Xu, C.; Caselle, M.; Müller, A.-S.
2023, February 3. ACCLAIM Meeting (2023), Online, February 3, 2023 

Bayesian Optimization for SASE Tuning at the European XFEL
Xu, C.; Bründermann, E.; Santamaria Garcia, A.; Müller, A.-S.
2023, May. 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, May 7–12, 2023 

KIT – The Research University in the Helmholtz Association Characterization and optimization of laser-generated THz beam for THz based streaking
Nabinger, M.; Nasse, M. J.; Schäfer, J.; Steinmann, J. L.; Widmann, C.; Xu, C.; Bründermann, E.; Müller, A.-S.
2023, May. 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, May 7–12, 2023 

Bayesian Optimization for SASE Tuning at the European XFEL
Xu, C.; Santamaria Garcia, A.; Tomin, S.; Mueller, A.-S.; Bründermann, E.
2023, September 26. (R. Assmann, P. McIntosh, A. Fabris, G. Bisoffi, I. Andrian & G. Vinicola, Eds.), 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, May 7–12, 2023 

Beam trajectory control with lattice-agnostic reinforcement learning
Xu, C.; Kaiser, J.; Eichler, A.; Santamaria Garcia, A.; Mueller, A.-S.; Bründermann, E.
2023, September 26. (R. Assmann, P. McIntosh, A. Fabris, G. Bisoffi, I. Andrian & G. Vinicola, Eds.), 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, May 7–12, 2023 

Optimization Studies of Simulated THz Radiation at FLUTE
Xu, C.; Bründermann, E.; Müller, A.-S.; Santamaria Garcia, A.; Schwarz, M.; Schäfer, J.
2022. 13th International Particle Accelerator Conference : June 12-17, 2022, Impact Forum, Muangthong Thani, Bangkok, Thailand : conference proceedings. Ed.: T. Chanwattana, 2292–2295, JACoW Publishing. doi:10.18429/JACoW-IPAC2022-WEPOMS023  

Surrogate Modelling of the FLUTE Low-Energy Section
Xu, C.; Bründermann, E.; Müller, A.-S.; Santamaria Garcia, A.; Schäfer, J.
2022. 13th International Particle Accelerator Conference : June 12-17, 2022, Impact Forum, Muangthong Thani, Bangkok, Thailand : conference proceedings. Ed.: T. Chanwattana, 1182–1185, JACoW Publishing. doi:10.18429/JACoW-IPAC2022-TUPOPT070  

Transverse and Longitudinal Modulation of Photoinjection Pulses at FLUTE
Nabinger, M.; Müller, A.-S.; Nasse, M. J.; Sax, C.; Schäfer, J.; Widmann, C.; Xu, C.
2022. 13th International Particle Accelerator Conference : June 12-17, 2022, Impact Forum, Muangthong Thani, Bangkok, Thailand : conference proceedings. Ed.: T. Chanwattana, 1174–1177, JACoW Publishing. doi:10.18429/JACoW-IPAC2022-TUPOPT068  

Transverse and longitudinal modulation of photoinjection pulses at FLUTE
Nabinger, M.; Sax, C.; Bründermann, E.; Nasse, M. J.; Schäfer, J.; Widmann, C.; Xu, C.; Müller, A. S.
2022, September 26. 8. Annual MT Meeting (2022), Hamburg, Germany, September 26–27, 2022 

Bayesian Optimization of Simulated THz Radiation at FLUTE
Xu, C.; Bründermann, E.; Santamaria Garcia, A.; Schäfer, J.; Schwarz, M.; Müller, A. S.
2022, September 9. 10th MT-ARD-ST3 Meeting (2022), Berlin, Germany, September 7–9, 2022 

Transverse and longitudinal modulation of photoinjection pulses at FLUTE
Nabinger, M.; Sax, C.; Nasse, M. J.; Schäfer, J.; Widmann, C.; Xu, C.; Müller, A.-S.
2022, September 8. 10th MT-ARD-ST3 Meeting (2022), Berlin, Germany, September 7–9, 2022 

Machine learning to control and predict beam properties
Santamaria Garcia, A.; Blomley, E.; Caselle, M.; Scomparin, L.; Steinmann, J. L.; Xu, C.; Müller, A.-S.
2022, September 8. 10th MT-ARD-ST3 Meeting (2022), Berlin, Germany, September 7–9, 2022 

Optimization Studies of Simulated THz Radiation at FLUTE
Xu, C.; Bründermann, E.; Santamaria Garcia, A.; Schäfer, J.; Schwarz, M.; Müller, A. S.
2022, March. DPG-Frühjahrstagung : Physik der Hadronen und Kerne (HK), Plasmaphysik (P), Arbeitskreis Beschleunigerphysik (AKBP) (2022), Online, March 28–April 1, 2022 

Surrogate Modelling of the FLUTE Low-Energy Section
Xu, C.; Bründermann, E.; Santamaria Garcia, A.; Schäfer, J.; Müller, A.-S.
2022, September. 8. Annual MT Meeting (2022), Hamburg, Germany, September 26–27, 2022 

Optimization Studies of Simulated THz Radiation at FLUTE
Xu, C.; Bründermann, E.; Santamaria Garcia, A.; Schäfer, J.; Schwarz, M.; Müller, A.-S.
2022, September. 10th MT-ARD-ST3 Meeting (2022), Berlin, Germany, September 7–9, 2022 

THz Radiation Optimization at Linac using Machine Learning Methods
Xu, C.; Santamaria Garcia, A.
2022, November. 3rd ICFA Beam Dynamics Mini-Workshop on Machine Learning Applications for Particle Accelerators (2022), Chicago, IL, USA, November 1–4, 2022 

Optimization Studies of Simulated THz Radiation at FLUTE
Xu, C.; Bründermann, E.; Müller, A.-S.; Santamaria Garcia, A.; Schwarz, M.; Schäfer, J.
2022. 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, June 12–17, 2022 

Surrogate Modelling of the FLUTE Low-Energy Section
Xu, C.; Bründermann, E.; Müller, A.-S.; Santamaria Garcia, A.; Schäfer, J.
2022. 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, June 12–17, 2022 

Transverse and Longitudinal Modulation of Photoinjection Pulses at FLUTE
Nabinger, M.; Müller, A.-S.; Nasse, M. J.; Sax, C.; Schäfer, J.; Widmann, C.; Xu, C.
2022. 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, June 12–17, 2022 

First Steps Toward an Autonomous Accelerator, a Common Project Between DESY and KIT
Eichler, A.; Burkart, F.; Kaiser, J.; Kuropka, W.; Stein, O.; Xu, C.; Bründermann, E.; Santamaria Garcia, A.
2021. 12th International Particle Accelerator Conference : virtual edition, May 24th-28th, 2021, Brazil : proceedings volume / IPAC2021. Ed.: R. Picoreti, 2182–2185, JACoW Publishing. doi:10.18429/JACoW-IPAC2021-TUPAB298  

Machine Learning Based Spatial Light Modulator Control for the Photoinjector Laser at FLUTE
Xu, C.; Bründermann, E.; Müller, A.-S.; Nasse, M. J.; Santamaria Garcia, A.; Sax, C.; Widmann, C.; Eichler, A.
2021. 12th International Particle Accelerator Conference : virtual edition, May 24th-28th, 2021, Brazil : proceedings volume / IPAC2021. Ed.: R. Picoreti, 3332–3335, JACoW Publishing. doi:10.18429/JACoW-IPAC2021-WEPAB289  

Machine Learning Activities for Particle Accelerators at KIT
Santamaria Garcia, A.; Boltz, T.; Bruchon, N.; Bründermann, E.; Xu, C.; Müller, A.-S.
2021, December. ACCLAIM Meeting (2021), Online, December 14–15, 2021 

Highlights & News @KIT
Santamaria Garcia, A.; Bruchon, N.; Caselle, M.; Bründermann, E.; Kopmann, A.; Xu, C.; Müller, A.-S.
2021, August 20. ACCLAIM Meeting (2021), Online, August 20, 2021 

Reinforcement Learning
Bründermann, E.; Santamaria Garcia, A.; Xu, C.; Bruchon, N.
2021, July 1. 2nd Action Plan ErUM-Data Community Meeting (2021), Online, July 1, 2021 

Highlights & News @KIT
Santamaria Garcia, A.; Bruchon, N.; Caselle, M.; Bründermann, E.; Kopmann, A.; Xu, C.; Müller, A.-S.
2021, May 28. ACCLAIM Meeting (2021), Online, May 28, 2021 

Machine Learning activities for accelerators @ KIT
Santamaria Garcia, A.; Boltz, T.; Bründermann, E.; Härer, B.; Mochihashi, A.; Nasse, M. J.; Sax, C.; Xu, C.; Müller, A.-S.
2021, May 12. LEAPS Integrated Platform Workshop (LIP 2021), Online, May 11–12, 2021 

Modulation of Photoinjector Laser with SLM
Xu, C.
2021, February 1. 7th MT student retreat (2021), Online, February 1, 2021 

Machine Learning Activities at KIT for Accelerators
Santamaria Garcia, A.; Boltz, T.; Bründermann, E.; Härer, B.; Mochihashi, A.; Nasse, M. J.; Sax, C.; Xu, C.; Müller, A.-S.
2021, February 3. 7th Annual MT Meeting (Part 1) (2021), Online, February 1–3, 2021 

Towards Automatic Tuning and Control of Accelerators
Xu, C.; Nasse, M. J.; Nabinger, M.; Santamaria Garcia, A.; Sax, C.; Bründermann, E.; Müller, A.-S.
2021, September 30. 9th MT ARD ST3 meeting (2021), Online, September 29–October 1, 2021 

Machine Learning Applications for Particle Accelerators
Santamaria Garcia, A.; Bründermann, E.; Boltz, T.; Bruchon, N.; Xu, C.; Müller, A.-S.
2021, September 8. HeKKSaGOn (German-Japanese University Alliance) Data Science Workshop (2021), Online, September 7–8, 2021 

Towards control of a photoinjector by using spatial light modulators at FLUTE
FLUTE Collaboration; Sax, C.; Nasse, M.; Widmann, C.; Mai, C.; Xu, C.; Santamaria Garcia, A.; Bründermann, E.; Müller, A.-S.
2021, March 17. Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion Materie und Kosmos - Arbeitskreis Beschleunigerphysik (SMuK 2021), Online, March 15–19, 2021 

Bayesian optimization of injection efficiency at KARA using Gaussian processes
Xu, C.; Boltz, T.; Mochihashi, A.; Santamaria Garcia, A.; Müller, A.-S.
2021, March 17. DPG-Frühjahrstagung / Arbeitskreis Beschleunigerphysik - AKBP: Beam Dynamics - AKBP 1.7 (2021), Online, March 15–19, 2021 

Machine Learning Based Spatial Light Modulator Control for the Photoinjector Laser at FLUTE
Xu, C.; Bründermann, E.; Müller, A.-S.; Nasse, M. J.; Santamaria Garcia, A.; Sax, C.; Widmann, C.; Eichler, A.
2021. 12th International Particle Accelerator Conference (IPAC 2021), Online, May 24–28, 2021 

First Steps Toward an Autonomous Accelerator, a Common Project Between DESY and KIT
Eichler, A.; Burkart, F.; Kaiser, J.; Kuropka, W.; Stein, O.; Xu, C.; Bründermann, E.; Santamaria Garcia, A.
2021. 12th International Particle Accelerator Conference (IPAC 2021), Online, May 24–28, 2021 

First Steps Toward an Autonomous Accelerator, a Common Project Between DESY and KIT
Eichler, A.; Burkart, F.; Kaiser, J.; Kuropka, W.; Stein, O.; Xu, C.; Bründermann, E.; Santamaria Garcia, A.
2021. doi:10.5445/IR/1000137667 

Machine Learning Based Spatial Light Modulator Control for the Photoinjector Laser at FLUTE
Xu, C.; Bründermann, E.; Müller, A.-S.; Nasse, M. J.; Santamaria Garcia, A.; Sax, C.; Widmann, C.; Eichler, A.
2021. doi:10.5445/IR/1000137411 

Artificial Intelligence Activities at KIT for Accelerators
Santamaria Garcia, A.; Boltz, T.; Bründermann, E.; Härer, B.; Mochihashi, A.; Xu, C.; Müller, A.-S.
2020, September 24. 8th MT ARD ST3 Meeting 2020, Karlsruhe, Deutschland (2020), Online, September 23–24, 2020