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We present a precision measurement of the axial-vector coupling constant $g_A$ in the decay of polarized free neutrons. For the first time, a pulsed cold neutron beam was used for this purpose. By this method, leading sources of systematic…

A method for circular e$^-$/e$^+$ accelerator beam energy measurement is proposed. Coordinate of an electron (or a positron) in a focusing magnetic spectrometer built in a circular accelerator depends on its energy, two spectrometer…

Instrumentation and Detectors · Physics 2017-09-13 V. V. Kaminskiy , N. Yu. Muchnoi , V. N. Zhilich

We present methods to measure the beam polarizations and the luminosity of $\gamma \gamma$ colliders at TeV energy scale. The beam polarizations of a $\gamma \gamma$ collider can easily be monitored by comparing the numbers of events of the…

High Energy Physics - Phenomenology · Physics 2011-07-19 Y. Yasui , I. Watanabe , J. Kodaira , I. Endo

Access to high-energy particle beams is key for testing high-energy physics (HEP) instruments. Accelerators for cancer treatment can serve as such a testing ground. However, HEP instrument tests typically require particle fluxes…

We present a thermometry scheme to extract the temperature of a 2DEG by monitoring the charge occupation of a weakly tunnel-coupled 'thermometer' quantum dot using a quantum point contact detector. Electronic temperatures between 97 mK and…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 A. Mavalankar , S. J. Chorley , J. Griffiths , G. A. C. Jones , I. Farrer , D. A. Ritchie , C. G. Smith

An X-ray photoelectric polarimeter based on the Gas Pixel Detector has been proposed to be included in many upcoming space missions to fill the gap of about 30 years from the first (and to date only) positive measurement of polarized X-ray…

Beam commissioning of the SuperKEKB collider began in 2016. The Beam Exorcism for A STable experiment II (BEAST II) project is particularly designed to measure the beam backgrounds around the interaction point of the SuperKEKB collider for…

Instrumentation and Detectors · Physics 2017-11-22 Y. T. Chen , J. C. Lin , J. T. Chen , K. N. Chu , K. Huang , S. Koirala , J. J. Liau , F. H. Lin , K. P. Lin , J. G. Shiu , M. Z. Wang

As part of the spin physics program at Jefferson Laboratory (JLab), a M\o ller polarimeter was developed to measure the polarization of electron beam of energies 0.8 to 5.0 GeV. A unique signature for M\o ller scattering is obtained using a…

Monolithic CMOS pixel detectors have emerged as competitive contenders in the field of high-energy particle physics detectors. By utilizing commercial processes they offer high-volume production of such detectors. A series of prototypes has…

The Simons Array (SA) project is a ground-based Cosmic Microwave Background (CMB) polarization experiment. The SA observes the sky using three telescopes, and POLARBEAR-2A (PB-2A) is the receiver system on the first telescope. For the…

The structure of the excited $2^{3}$S and $2^{3}$P triplet states of $^{3}$He and $^{4}$He in an applied magnetic field B is studied using different approximations of the atomic Hamiltonian. All optical transitions (line positions and…

Atomic Physics · Physics 2009-11-07 E. Courtade , F. Marion , P. -J. Nacher , G. Tastevin , K. Kiersnowski , T. Dohnalik

Semiconductor tunable barrier single-electron pumps can produce output current of hundreds of picoamperes at sub ppm precision, approaching the metrological requirement for the direct implementation of the current standard. Here, we operate…

Mesoscale and Nanoscale Physics · Physics 2024-03-01 Ajit Dash , Steve Yianni , MengKe Feng , Fay Hudson , Andre Saraiva , Andrew S. Dzurak , Tuomo Tanttu

The double-polarization observable $E$ was studied for the reaction $\gamma p\to p\omega$ using the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B at the Thomas Jefferson National Accelerator Facility and the longitudinally-polarized…

Nuclear Experiment · Physics 2019-08-13 Z. Akbar , P. Roy , S. Park , V. Crede , A. V. Anisovich , I. Denisenko , E. Klempt , V. A. Nikonov , A. V. Sarantsev , K. P. Adhikari , S. Adhikari , M. J. Amaryan , S. Anefalos Pereira , H. Avakian , J. Ball , M. Battaglieri , V. Batourine , I. Bedlinskiy , S. Boiarinov , W. J. Briscoe , J. Brock , W. K. Brooks , V. D. Burkert , F. T. Cao , C. Carlin , D. S. Carman , A. Celentano , G. Charles , T. Chetry , G. Ciullo , L. Clark , P. L. Cole , M. Contalbrigo , O. Cortes , A. D'Angelo , N. Dashyan , R. De Vita , E. De Sanctis , A. Deur , C. Djalali , M. Dugger , R. Dupre , H. Egiyan , L. El Fassi , P. Eugenio , G. Fedotov , R. Fersch , A. Filippi , A. Fradi , M. Garcon , N. Gevorgyan , K. L. Giovanetti , F. X. Girod , C. Gleason , W. Gohn , E. Golovach , R. W. Gothe , K. A. Griffioen , M. Guidal , L. Guo , K. Hafidi , H. Hakobyan , C. Hanretty , N. Harrison , M. Hattawy , D. Heddle , K. Hicks , G. Hollis , M. Holtrop , D. G. Ireland , B. S. Ishkhanov , E. L. Isupov , D. Jenkins , S. Joosten , C. D. Keith , D. Keller , G. Khachatryan , M. Khachatryan , M. Khandaker , A. Kim , W. Kim , A. Klein , F. J. Klein , V. Kubarovsky , L. Lanza , K. Livingston , I. J. D. MacGregor , N. Markov , B. McKinnon , D. G. Meekins , T. Mineeva , V. Mokeev , A. Movsisyan , C. Munoz Camacho , P. Nadel-Turonski , S. Niccolai , M. Osipenko , A. I. Ostrovidov , M. Paolone , R. Paremuzyan , K. Park , E. Pasyuk , W. Phelps , O. Pogorelko , J. W. Price , Y. Prok , D. Protopopescu , B. A. Raue , M. Ripani , B. G. Ritchie , A. Rizzo , G. Rosner , F. Sabatie , C. Salgado , R. A. Schumacher , Y. G. Sharabian , Iu. Skorodumina , G. D. Smith , D. I. Sober , D. Sokhan , N. Sparveris , S. Stepanyan , I. I. Strakovsky , S. Strauch , M. Taiuti , M. Ungaro , H. Voskanyan , E. Voutier , X. Wei , M. H. Wood , N. Zachariou , L. Zana , J. Zhang , Z. W. Zhao

The NA48 experiments aims at a precise measurement of direct CP violation in the neutral Kaon system. This puts stringent requirements on the electromagnetic calorimeter used to detect photons of average energy 25 GeV. The choice of NA48 is…

High Energy Physics - Experiment · Physics 2007-05-23 Guillaume Unal

We use two-dimensional transverse laser cooling to produce an ultracold beam of YbF molecules. Through experiments and numerical simulations, we study how the cooling is influenced by the polarization configuration, laser intensity, laser…

The lack of p-type doping has impeded the development of vertical gallium oxide (Ga2O3) devices. Current blocking layers (CBL) using implanted deep acceptors has been used to demonstrate vertical devices. This paper presents the first…

Gamma-Ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit-A (DRO-A) satellite, with the scientific objective of detecting gamma-ray bursts in the energy range of 20 keV to 1 MeV. GTM is equipped with five…

In the DeeMe experiment, approximately $70\ \mathrm{GHz/mm^{2}}$ prompt-charged particles will hit the multi-wire proportional chambers (MWPCs) before signal electrons come. To avoid the space charge effect, we developed fast HV-switching…

Instrumentation and Detectors · Physics 2018-12-05 N. Teshima

A high-energy photon polarimeter for astrophysics studies in the energy range from 10 MeV to 800 MeV is considered. The proposed concept uses a stack of silicon micro-strip detectors where they play the roles of both a converter and a…

In conventional particle beam microscopy, knowledge of the beam current is essential for accurate micrograph formation and sample milling. This generally necessitates offline calibration of the instrument. In this work, we establish that…

Medical Physics · Physics 2026-03-12 Sheila W. Seidel , Luisa Watkins , Minxu Peng , Akshay Agarwal , Christopher Yu , Vivek K Goyal