The CLAS12 Spectrometer at Jefferson Laboratory
The CLAS12 Spectrometer at Jefferson Laboratory
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DOI：
10.1016/j.nima.2020.163419
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
V. Burkert;L. Elouadrhiri;K. Adhikari;S. Adhikari;M. Amaryan;D. Anderson;G. Angelini;M. A. Antonioli;H. Atac;S. Aune;H. Avakian;C. Gayoso;N. Baltzell;L. Barion;M. Battaglieri;V. Baturin;I. Bedlinskiy;F. Benmokhtar;A. Bianconi;A. Biselli;P. Bonneau;F. Bossu;S. Boyarinov;W. Briscoe;W. Brooks;K. Bruhwel;D. Carman;A. Celentano;G. Charles;P. Chatagnon;T. Chetry;G. Christiaens;S. Christo;G. Ciullo;B. Clary;P. Cole;M. Contalbrigo;M. Cook;V. Crede;R. Cruz-Torres;C. Cuevas;A. D’Angelo;N. Dashyan;M. Defurne;A. Deur;R. Vita;S. Diehl;C. Djalali;G. Dodge;R. Dupré;M. Ehrhart;Lamiaa El Fassi;B. Eng;T. Ewing;R. Fair;G. Fedotov;A. Filippi;T. Forest;M. Garçon;G. Gavalian;P. Ghoshal;G. Gilfoyle;K. Giovanetti;F. Girod;D. Glazier;E. Golovatch;R. Gothe;Y. Gotra;K. Griffioen;M. Guidal;V. Gyurjyan;K. Hafidi;H. Hakobyan;C. Hanretty;N. Harrison;M. Hattawy;F. Hauenstein;T. Hayward;D. Heddle;P. Hemler;O. Hen;K. Hicks;A. Hobart;J. Hogan;M. Holtrop;Y. Ilieva;I. Illari;D. Insley;D. Ireland;B. Ishkhanov;E. Isupov;G. Jacobs;H. Jo;R. Johnston;K. Joo;S. Joosten;T. Kageya;D. Kashy;C. Keith;D. Keller;M. Khachatryan;A. Khanal;A. Kim;C. W. Kim;W. Kim;V. Kubarovsky;S. Kuhn;L. Lanza;M. Leffel;V. Lucherini;A. Lung;M. Kabir;M. Leali;S. Lee;P. Lenisa;K. Livingston;M. Lowry;I. Macgregor;I. Mandjavidze;D. Marchand;N. Markov;V. Mascagna;B. Mckinnon;M. Mcmullen;C. Mealer;M. Mestayer;Z. Meziani;R. Miller;R. Milner;T. Mineeva;M. Mirazita;V. Mokeev;P. Moran;A. Movsisyan;C. Camacho;P. Naidoo;S. Nanda;J. Newton;S. Niccolai;G. Niculescu;M. Osipenko;M. Paolone;L. Pappalardo;R. Paremuzyan;O. Pastor;E. Pasyuk;W. Phelps;O. Pogorelko;J. Poudel;J. Price;K. Price;S. Procureur;Y. Prok;D. Protopopescu;R. Rajput-Ghoshal;B. Raue;B. Raydo;M. Ripani;J. Ritman;Alessandro Rizzo;G. Rosner;P. Rossi;J. Rowley;B. Roy;F. Sabatié;C. Salgado;S. Schadmand;Aaron J. Schmidt;E. Segarra;V. Sergeyeva;Y. Sharabian;U. Shrestha;I. Skorodumina;G. Smith;L. Smith;D. Sokhan;O. Soto;N. Sparveris;S. Stepanyan;P. Stoler;S. Strauch;J. Tan;M. Taylor;D. Tilles;M. Turisini;N. Tyler;M. Ungaro;L. Venturelli;H. Voskanyan;E. Voutier;D. Watts;X. Wei;L. Weinstein;C. Wiggins;M. Wiseman;M. Wood;A. Yegneswaran;G. Young;N. Zachariou;M. Zarecky;Jinlong Zhang;Z. Zhao;V. Ziegler
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文献类型：
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作者：
V. Burkert;L. Elouadrhiri;K. Adhikari;S. Adhikari;M. Amaryan;D. Anderson;G. Angelini;M. A. Antonioli;H. Atac;S. Aune;H. Avakian;C. Gayoso;N. Baltzell;L. Barion;M. Battaglieri;V. Baturin;I. Bedlinskiy;F. Benmokhtar;A. Bianconi;A. Biselli;P. Bonneau;F. Bossu;S. Boyarinov;W. Briscoe;W. Brooks;K. Bruhwel;D. Carman;A. Celentano;G. Charles;P. Chatagnon;T. Chetry;G. Christiaens;S. Christo;G. Ciullo;B. Clary;P. Cole;M. Contalbrigo;M. Cook;V. Crede;R. Cruz-Torres;C. Cuevas;A. D’Angelo;N. Dashyan;M. Defurne;A. Deur;R. Vita;S. Diehl;C. Djalali;G. Dodge;R. Dupré;M. Ehrhart;Lamiaa El Fassi;B. Eng;T. Ewing;R. Fair;G. Fedotov;A. Filippi;T. Forest;M. Garçon;G. Gavalian;P. Ghoshal;G. Gilfoyle;K. Giovanetti;F. Girod;D. Glazier;E. Golovatch;R. Gothe;Y. Gotra;K. Griffioen;M. Guidal;V. Gyurjyan;K. Hafidi;H. Hakobyan;C. Hanretty;N. Harrison;M. Hattawy;F. Hauenstein;T. Hayward;D. Heddle;P. Hemler;O. Hen;K. Hicks;A. Hobart;J. Hogan;M. Holtrop;Y. Ilieva;I. Illari;D. Insley;D. Ireland;B. Ishkhanov;E. Isupov;G. Jacobs;H. Jo;R. Johnston;K. Joo;S. Joosten;T. Kageya;D. Kashy;C. Keith;D. Keller;M. Khachatryan;A. Khanal;A. Kim;C. W. Kim;W. Kim;V. Kubarovsky;S. Kuhn;L. Lanza;M. Leffel;V. Lucherini;A. Lung;M. Kabir;M. Leali;S. Lee;P. Lenisa;K. Livingston;M. Lowry;I. Macgregor;I. Mandjavidze;D. Marchand;N. Markov;V. Mascagna;B. Mckinnon;M. Mcmullen;C. Mealer;M. Mestayer;Z. Meziani;R. Miller;R. Milner;T. Mineeva;M. Mirazita;V. Mokeev;P. Moran;A. Movsisyan;C. Camacho;P. Naidoo;S. Nanda;J. Newton;S. Niccolai;G. Niculescu;M. Osipenko;M. Paolone;L. Pappalardo;R. Paremuzyan;O. Pastor;E. Pasyuk;W. Phelps;O. Pogorelko;J. Poudel;J. Price;K. Price;S. Procureur;Y. Prok;D. Protopopescu;R. Rajput-Ghoshal;B. Raue;B. Raydo;M. Ripani;J. Ritman;Alessandro Rizzo;G. Rosner;P. Rossi;J. Rowley;B. Roy;F. Sabatié;C. Salgado;S. Schadmand;Aaron J. Schmidt;E. Segarra;V. Sergeyeva;Y. Sharabian;U. Shrestha;I. Skorodumina;G. Smith;L. Smith;D. Sokhan;O. Soto;N. Sparveris;S. Stepanyan;P. Stoler;S. Strauch;J. Tan;M. Taylor;D. Tilles;M. Turisini;N. Tyler;M. Ungaro;L. Venturelli;H. Voskanyan;E. Voutier;D. Watts;X. Wei;L. Weinstein;C. Wiggins;M. Wiseman;M. Wood;A. Yegneswaran;G. Young;N. Zachariou;M. Zarecky;Jinlong Zhang;Z. Zhao;V. Ziegler
摘要：美国杰斐逊实验室B厅12gev束流能量（class12） CEBAF大接收谱仪用于研究电致核反应和强子反应。该光谱仪提供了带电粒子和中性粒子的有效检测在整个固体角的很大一部分。CLAS12是杰斐逊实验室连续电子束加速器设施能量倍增项目的一部分，由美国能源部资助。48个国际合作机构参与了探测器硬件的设计和建造，开发了用于模拟复杂事件模式的软件包，并委托了探测器系统。CLAS12采用双磁体系统，其中一个超导环面磁体可提供很大程度上的方位场分布，覆盖35°前极角范围；另一个螺线管磁体和探测器可覆盖35°至125°极角范围，覆盖全方位。使用漂移室在前进方向和使用顶点跟踪器在中心方向进行轨迹重建，动量分辨率分别< 1%和< 3%。切伦科夫计数器，飞行时间闪烁体和电磁量热计提供了良好的粒子识别。快速触发和高数据采集率允许在10 ~ 35 cm−2 s−1的光度下操作。这些能力被广泛用于研究核子、原子核和介子的结构和相互作用，使用极化和非极化电子束和目标束能量高达11 GeV。本文对CLAS12的设计、结构和性能进行了概述。
Abstract The CEBAF Large Acceptance Spectrometer for operation at 12 GeV beam energy (CLAS12) in Hall B at Jefferson Laboratory is used to study electro-induced nuclear and hadronic reactions. This spectrometer provides efficient detection of charged and neutral particles over a large fraction of the full solid angle. CLAS12 has been part of the energy-doubling project of Jefferson Lab’s Continuous Electron Beam Accelerator Facility, funded by the United States Department of Energy. An international collaboration of 48 institutions contributed to the design and construction of detector hardware, developed the software packages for the simulation of complex event patterns, and commissioned the detector systems. CLAS12 is based on a dual-magnet system with a superconducting torus magnet that provides a largely azimuthal field distribution that covers the forward polar angle range up to 35∘, and a solenoid magnet and detector covering the polar angles from 35° to 125° with full azimuthal coverage. Trajectory reconstruction in the forward direction using drift chambers and in the central direction using a vertex tracker results in momentum resolutions of< 1% and< 3%, respectively. Cherenkov counters, time-of-flight scintillators, and electromagnetic calorimeters provide good particle identification. Fast triggering and high data-acquisition rates allow operation at a luminosity of 1 0 35 cm− 2 s− 1. These capabilities are being used in a broad program to study the structure and interactions of nucleons, nuclei, and mesons, using polarized and unpolarized electron beams and targets for beam energies up to 11 GeV. This paper gives a general description of the design, construction, and performance of CLAS12.