arXiv - PHYS - Accelerator Physics最新文献_第6页

Neutrino Program at Fermilab -- Enhancing proton beam power and accelerator infrastructure 费米实验室中微子计划 -- 增强质子束功率和加速器基础设施

arXiv - PHYS - Accelerator Physics Pub Date : 2024-07-10 DOI: arxiv-2407.08038

Ganguly SudeshnaFermilab

{"title":"Neutrino Program at Fermilab -- Enhancing proton beam power and accelerator infrastructure","authors":"Ganguly SudeshnaFermilab","doi":"arxiv-2407.08038","DOIUrl":"https://doi.org/arxiv-2407.08038","url":null,"abstract":"The upcoming long baseline neutrino experiments aim to enhance proton beam\u0000power to multi-MW scale and utilize large-scale detectors to address the\u0000challenge of limited event statistics. The DUNE experiment at LBNF will test\u0000the three neutrino flavor paradigm and directly search for CP violation by\u0000studying oscillation signatures in the high intensity $nu_{mu}$\u0000(anti-$nu_{mu}$) beam to $nu_{e}$ (anti-$nu_{e}$) measured over a long\u0000baseline. Higher beam power and improved accelerator up-time will enhance\u0000neutrino flux for the neutrino program by increasing the number of protons on\u0000target. LBNF/DUNE, as well as PIP-II upgrade and Accelerator Complex Evolution\u0000(ACE) plan, play a vital role in this effort. The scientific potential of ACE\u0000plan extends beyond neutrino physics, encompassing endeavors such as the Muon\u0000Collider, Charged Lepton Flavor Violation (CLFV), Dark Sectors, and exploration\u0000of neutrinos beyond DUNE.par In the era of higher-power accelerator operation\u0000, research in target materials and beam instrumentation is crucial for\u0000optimizing design modifications. This abstract discusses Fermilab ACE, the\u0000science opportunities it provides, and how Fermilab is pushing the limits of\u0000proton beam power and accelerator infrastructure. By tackling neutrino beam\u0000challenges and exploring research and development ideas, we are advancing our\u0000understanding of fundamental particles and their interactions.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of the impact of an additional corrugated structure impedance on the bursting dynamics in an electron storage ring 模拟附加波纹结构阻抗对电子储存环迸发动力学的影响

arXiv - PHYS - Accelerator Physics Pub Date : 2024-07-08 DOI: arxiv-2407.05828

Sebastian Maier, Miriam Brosi, Akira Mochihashi, Michael J. Nasse, Markus Schwarz, Anke-Susanne Müller

{"title":"Simulation of the impact of an additional corrugated structure impedance on the bursting dynamics in an electron storage ring","authors":"Sebastian Maier, Miriam Brosi, Akira Mochihashi, Michael J. Nasse, Markus Schwarz, Anke-Susanne Müller","doi":"arxiv-2407.05828","DOIUrl":"https://doi.org/arxiv-2407.05828","url":null,"abstract":"In the case of single-digit picosecond bunch length, synchrotron light\u0000sources produce intense coherent radiation up to the THz range. The reduction\u0000of the bunch length by lowering the momentum compaction factor (low-$alpha$)\u0000gives rise to the micro-bunching instability, which is on one hand a crucial\u0000roadblock in the X-ray range during to the resulting effective bunch\u0000lengthening but on the other hand also an opportunity for the generation of\u0000intense THz radiation if it can be controlled appropriately. In the KIT storage\u0000ring KARA (Karlsruhe Research Accelerator), two parallel plates with periodic\u0000rectangular corrugations are planned to be installed in an electron storage\u0000ring. These plates create an additional longitudinal impedance based on their\u0000geometry, which can affect the beam dynamics. The resulting impedance\u0000manipulation will be used to study and control the longitudinal electron beam\u0000dynamics and the emitted coherent synchrotron radiation (CSR). This paper\u0000presents the results of systematic studies in simulation of the impact of\u0000additional corrugated plate impedances on the longitudinal beam dynamics using\u0000the example of the KARA storage ring. If the periodicity of the wake function\u0000of the corrugated plates matches the size of the substructures in the\u0000longitudinal bunch profile, the instability threshold can be effectively\u0000manipulated. This extends intense THz radiation to different beam current\u0000regimes.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonexistence of Integrable Nonlinear Magnetic Fields with Invariants Quadratic in Momenta 不存在矩二次无变量的可积分非线性磁场

arXiv - PHYS - Accelerator Physics Pub Date : 2024-07-04 DOI: arxiv-2407.04145

Bela Erdelyi, Kevin Hamilton, Jacob Pratscher, Marie Swartz

{"title":"Nonexistence of Integrable Nonlinear Magnetic Fields with Invariants Quadratic in Momenta","authors":"Bela Erdelyi, Kevin Hamilton, Jacob Pratscher, Marie Swartz","doi":"arxiv-2407.04145","DOIUrl":"https://doi.org/arxiv-2407.04145","url":null,"abstract":"Nonlinear, completely integrable Hamiltonian systems that serve as blueprints\u0000for novel particle accelerators at the intensity frontier are promising avenues\u0000for research, as Fermilab's Integrable Optics Test Accelerator (IOTA) example\u0000clearly illustrates. Here, we show that only very limited generalizations are\u0000possible when no approximations in the underlying Hamiltonian or Maxwell\u0000equations are allowed, as was the case for IOTA. Specifically, no such systems\u0000exist with invariants quadratic in the momenta, precluding straightforward\u0000generalization of the Courant-Snyder theory of linear integrable systems in\u0000beam physics. We also conjecture that no such systems exist with invariants of\u0000higher degree in the momenta. This leaves solenoidal magnetic fields, including\u0000their nonlinear fringe fields, as the only completely integrable static\u0000magnetic fields, albeit with invariants that are linear in the momenta. The\u0000difficulties come from enforcing Maxwell equations; without constraints, we\u0000show that there are many solutions. In particular, we discover a previously\u0000unknown large family of integrable Hamiltonians.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LEEx-B: Low Energy Experimental Bench Development at IPHC-CNRS Strasbourg LEEx-B：在斯特拉斯堡 IPHC-CNRS 开发低能实验台

arXiv - PHYS - Accelerator Physics Pub Date : 2024-07-02 DOI: arxiv-2407.02107

E. Bouquerel, T. Adama, C. Maazouzi, E. Traykov, P. Graehling, C. Mathieu

引用次数: 0

Two-bunch seeding of soft X-ray free electron lasers 软 X 射线自由电子激光器的双束播种

arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-28 DOI: arxiv-2406.19984

E. Schneidmiller, I. Zagorodnov

{"title":"Two-bunch seeding of soft X-ray free electron lasers","authors":"E. Schneidmiller, I. Zagorodnov","doi":"arxiv-2406.19984","DOIUrl":"https://doi.org/arxiv-2406.19984","url":null,"abstract":"Seeded Free Electron Lasers (FELs) demonstrate a good performance and are\u0000successfully used in different user experiments in extreme ultraviolet and soft\u0000X-ray regimes. In this paper a simple modification of the seeding scenario is\u0000proposed relying on generation of two closely spaced bunches with very\u0000different properties: a low-current seeding bunch, and a high-current bunch\u0000that amplifies coherent radiation, produced by the seeding bunch. This approach\u0000eliminates different limitations and mitigates some harmful effects in the\u0000standard scenario. In particular, one can generate very high harmonic numbers\u0000with a moderate laser power in a simple high-gain harmonic generation (HGHG)\u0000scheme. Alternatively, in case of moderate harmonic numbers, one can strongly\u0000reduce the required laser power thus simplifying design of high repetition rate\u0000seeded FELs. An influence of beam dynamics effects (like nonlinearities of the\u0000longitudinal phase space of electron beams, coherent synchrotron radiation,\u0000longitudinal space charge, geometrical wakefields, microbunching instabilities\u0000etc.) on properties of output radiation (spectrum broadening, pedestals,\u0000stability) can be to a large extent reduced in the proposed scheme. In this\u0000paper we illustrate the operation of the two-bunch seeding scheme in HGHG\u0000configuration with realistic start-to-end simulations for the soft X-ray user\u0000facility FLASH. We show that nearly Fourier-limited multi-gigawatt pulses can\u0000be generated at 4 nm using the present compact design of the undulator system.\u0000With several thousand pulses per second this can be a unique source for photon\u0000science.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neural Networks for ID Gap Orbit Distortion Compensation in PETRA III 用于 PETRA III 中 ID 间隙轨道畸变补偿的神经网络

arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-25 DOI: arxiv-2406.17494

Bianca Veglia, Ilya Agapov, Joachim Keil

引用次数: 0

Ray tracing simulations of bending magnet sources with SHADOW4 利用 SHADOW4 对弯曲磁源进行光线跟踪模拟

arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-24 DOI: arxiv-2406.16446

Manuel Sanchez del Rio, Howard A. Padmore

引用次数: 0

Linac_Gen: integrating machine learning and particle-in-cell methods for enhanced beam dynamics at Fermilab Linac_Gen：整合机器学习和粒子在胞方法，增强费米实验室的光束动力学

arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-24 DOI: arxiv-2406.16630

Abhishek Pathak

{"title":"Linac_Gen: integrating machine learning and particle-in-cell methods for enhanced beam dynamics at Fermilab","authors":"Abhishek Pathak","doi":"arxiv-2406.16630","DOIUrl":"https://doi.org/arxiv-2406.16630","url":null,"abstract":"Here, we introduce Linac_Gen, a tool developed at Fermilab, which combines\u0000machine learning algorithms with Particle-in-Cell methods to advance beam\u0000dynamics in linacs. Linac_Gen employs techniques such as Random Forest, Genetic\u0000Algorithms, Support Vector Machines, and Neural Networks, achieving a tenfold\u0000increase in speed for phase-space matching in linacs over traditional methods\u0000through the use of genetic algorithms. Crucially, Linac_Gen's adept handling of\u00003D field maps elevates the precision and realism in simulating beam\u0000instabilities and resonances, marking a key advancement in the field.\u0000Benchmarked against established codes, Linac_Gen demonstrates not only improved\u0000efficiency and precision in beam dynamics studies but also in the design and\u0000optimization of linac systems, as evidenced in its application to Fermilab's\u0000PIP-II linac project. This work represents a notable advancement in accelerator\u0000physics, marrying ML with PIC methods to set new standards for efficiency and\u0000accuracy in accelerator design and research. Linac_Gen exemplifies a novel\u0000approach in accelerator technology, offering substantial improvements in both\u0000theoretical and practical aspects of beam dynamics.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dedicated beam position monitor pair for model-independent lattice characterization at NSLS-II 在 NSLS-II 上进行与模型无关的晶格表征的专用光束位置监测器对

arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-24 DOI: arxiv-2406.16660

Yongjun Li, Kiman Ha, Danny Padrazo, Bernard Kosciuk, Belkacem Bacha, Michael Seegitz, Robert Rainer, Joseph Mead, Xi Yang, Yuke Tian, Robert Todd, Victor Smaluk, Weixing Cheng

{"title":"Dedicated beam position monitor pair for model-independent lattice characterization at NSLS-II","authors":"Yongjun Li, Kiman Ha, Danny Padrazo, Bernard Kosciuk, Belkacem Bacha, Michael Seegitz, Robert Rainer, Joseph Mead, Xi Yang, Yuke Tian, Robert Todd, Victor Smaluk, Weixing Cheng","doi":"arxiv-2406.16660","DOIUrl":"https://doi.org/arxiv-2406.16660","url":null,"abstract":"This paper reports recent lattice characterization results obtained at the\u0000National Synchrotron Light Source II (NSLS-II) storage ring, conducted without\u0000reliance on a lattice model. A pair of beam position monitors (BPMs) with\u0000bunch-by-bunch (B$times$B) resolution, were recently installed in a section of\u0000the storage ring free of magnetic fields. The new BPM pair measured the beam,\u0000or bunch's transverse Poincar'e map precisely after the beam was excited.\u0000Linear one-turn-matrices (OTM) were then derived, and from these, the\u00004-dimensional coupled Twiss parameters were extracted at the locations of the\u0000BPM pair. By normalizing beam oscillation amplitudes with the Twiss parameters,\u0000the global action-variables were obtained. These action-variables facilitated\u0000the measurement of the local Twiss parameters observed by other BPMs\u0000independent on lattice model. This method is general, and particularly useful\u0000in certain scenarios such as a round beam mode in a diffraction-limited light\u0000source ring. We applied it to assess both weakly and strongly coupled lattices\u0000at the NSLS-II ring. Through analysis of the strongly coupled lattice, the\u0000quadrupole tilt errors were estimated to be less than 400 si{mu}rad.\u0000Utilizing the BPMs' B$times$B resolution, for the first time we observed the\u0000variations of the linear lattice along a long bunch-train.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Electron Microbunching Rotation for Generating Isolated Attosecond Soft X-ray Free-electron Laser Pulses 合成电子微束旋转以产生隔离的阿秒软 X 射线自由电子激光脉冲

arXiv - PHYS - Accelerator Physics Pub Date : 2024-06-21 DOI: arxiv-2406.14843

Hao Sun, Xiaofan Wang, Li Zeng, Weiqing Zhang

{"title":"Synthesis of Electron Microbunching Rotation for Generating Isolated Attosecond Soft X-ray Free-electron Laser Pulses","authors":"Hao Sun, Xiaofan Wang, Li Zeng, Weiqing Zhang","doi":"arxiv-2406.14843","DOIUrl":"https://doi.org/arxiv-2406.14843","url":null,"abstract":"Attosecond x-ray pulses play a crucial role in the study of ultrafast\u0000phenomena occurring within inner and valence electrons. Especially isolated\u0000attosecond pulses with high photon energy and high peak power are of great\u0000significance in single-shot imaging in the soft x-ray region, life sciences,\u0000and attosecond pump-probe experiments. In modern accelerators, laser\u0000manipulation of electrons can be used to tailor the ultrafast properties of\u0000free-electron laser (FEL) pulses. In this paper, we propose a novel laser\u0000manipulation technique that makes use of two laser beams with mutual delays and\u0000tilted wavefronts to synthesize microbunching rotation on the scale of infrared\u0000laser wavelengths within the electron bunch for generating isolated attosecond\u0000soft x-ray pulses. This microbunching rotation ultimately leads to an enhanced\u0000current contrast ratio between the main peak and the surrounding satellite\u0000peaks within the bunch. By properly accounting for the longitudinal space\u0000charge fields within the FEL undulator, a tapered undulator can further\u0000suppress the side peaks in the radiation pulse and enable the selection of an\u0000isolated, hundred-attosecond, GW-level soft x-ray pulse.","PeriodicalId":501318,"journal":{"name":"arXiv - PHYS - Accelerator Physics","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0