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Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 946:162701
Solid ammonia (NH 3 ) is commonly used as a dynamically polarized proton target for electron and muon scattering cross-section asymmetry measurements. As spin 1 + particles, the 14N nuclei in the target are also polarized and contribute a non-trivial
Autor:
F. Cooper, B. Kuekan, M.T.F. Pivi, D. Kharakh, R.E. Kirby, Johnny S. T. Ng, Tor Raubenheimer, C.M. Spencer, Lanfa Wang, F. K. King
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 621:33-38
The first experimental observation of magnetic resonances in electron clouds is reported. The resonance was observed as a modulation in cloud intensity for uncoated as well as TiN-coated aluminum surfaces in the positron storage ring of the PEP-II co
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 592:498-501
We constructed an ionization chamber (IQ to test the absolute intensity of the BEPC-LINAC (Beijing Electron Positron Collider-Linear Accelerator) test beam. The IC was adapted for the 1.89 GeV high-energy electron beam, with pulse time width of 1.2 n
Autor:
Hajime Shimizu, Hiroshi Yoshida, Hiromichi Yamazaki, M. Moriya, Toyohiko Kinoshita, Takahiro Iwata, S. Takita, Y. Yoshida, Fusashi Miyahara, H. Hariu, T. Nakabayashi, Masayuki Yamamoto, M. Itaya, T. Hayakawa, T. Sasaki, Takatsugu Ishikawa, Yasuhisa Tajima
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 550:258-266
A beam test has been performed on a prototype electromagnetic calorimeter of bismuth silicate BSO crystals for the first time using electrons of 0.5–3.0 GeV. The calorimeter consists of nine BSO crystals, 22 mm × 22 mm × 180 mm (15.6 radiation le
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 538:723-730
The profile of the annihilation radiation in aluminum using positrons from a 22 Na source was observed in a two-HPGe-detectors arrangement. The coincidence photon energy spectrum was fitted using a model function, accounting for both Doppler broadeni
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 536:319-322
We present the electron storage ring for an arrangement of electron–proton and electron–ion collisions at RHIC. High degree of radiative electron polarization will be achieved at the beam energy range 5–10 GeV with characteristic time about 10
Autor:
D. K. Toporkov, V. A. Kiselev, Yu. V. Shestakov, A.I. Mikaiylov, A.V. Grigoriev, S. A. Zevakov, Evgeny Levichev, I. A. Rachek, M. V. Dyug, B. A. Lazarenko, Sergei Nikitin, D. M. Nikolenko, V.N. Zhilich, S. I. Mishnev
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 536:338-343
A new method to determine the polarization of an electron beam circulating in a storage ring by a non-destructive way, based on measuring the asymmetry in scattering of beam electrons on electrons of the internal polarized gas jet target, has been de
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 515:605-613
Electron–positron pair production, the main process for high-energy photon interaction with matter, has a large analyzing power for linear polarized photons. Our calculations show that in the GeV energy range a compact polarimeter based on silicon
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 505:290-293
Accurate processing of low-energy X-ray spectra requires detailed knowledge of the detector response function. This has been determined for a high-purity germanium (HPGe) detector by using monochromatized synchrotron radiation in the 1–20 keV energ
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 457:564-570
A discussion is given of two types of ionizing particle detectors, which are based on radiation-generated charge carrier capture into quantum wells of semiconductors. The principle of operation of the two detector types depends on the strength of the