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1.
A pulsed high-voltage decelerator system to deliver low-energy antiprotons / Husson, A (IJCLab, Orsay) ; Kim, B H (Seoul Natl. U., Dept. Phys. Astron.) ; Welker, A (CERN) ; Charlton, M (Swansea U.) ; Choi, J J (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crépin, P -P (Paris, Lab. Kastler Brossel) ; Crivelli, P (Zurich, ETH-CSCS/SCSC) et al.
The GBAR (Gravitational Behavior of Antihydrogen at Rest) experiment at CERN requires efficient deceleration of 100 keV antiprotons provided by the new ELENA synchrotron ring to synthesize antihydrogen. This is accomplished using electrostatic deceleration optics and a drift tube that is designed to switch from -99 kV to ground when the antiproton bunch is inside – essentially a charged particle “elevator” – producing a 1 keV pulse. [...]
2021 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1002 (2021) 165245
Detaljert visning - Lignende elementer
2.
Accumulation of Positrons from a LINAC Based Source / GBAR Collaboration
The GBAR experiment aims to measure the gravitational acceleration of antihydrogen H. It will use H + ions formed by the interaction of antiprotons with a dense positronium cloud, which will require about $10^{10}$ positrons to produce one H + [...]
2020 - 3 p. - Published in : Acta Phys. Pol. A 137 (2020) 164-166
In : 15th International Workshop on Slow Positron Beam Techniques and Applications, Prague, Czechia, 2-6 Sep 2019, pp.164-166
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3.
Development of a PbWO$_4$ Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment / Kim, B H (Seoul Natl. U.) ; Choi, J J (Seoul Natl. U.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crivelli, P (Zurich, ETH) ; Crépin, P-P (Paris, Lab. Kastler Brossel) ; Dalkarov, O (Lebedev Inst.) ; Debu, P (IRFU, Saclay) ; Dodd, L (Swansea U.) et al.
We have developed a PbWO$_{4}$ (PWO) detector with a large dynamic range to measure the intensity of a positron beam and the absolute density of the ortho-positronium ($\mathrm{o-Ps}$) cloud it creates. A simulation study shows that a setup based on such detectors may be used to determine the angular distribution of the emission and reflection of $\mathrm{o-Ps}$ to reduce part of the uncertainties of the measurement. [...]
2020 - 4 p. - Published in : Acta Phys. Pol. A 137 (2020) 122-125
In : 15th International Workshop on Slow Positron Beam Techniques and Applications, Prague, Czechia, 2-6 Sep 2019, pp.122-125
Detaljert visning - Lignende elementer
4.
Positron production using a 9 MeV electron linac for the GBAR experiment / Charlton, M. (Swansea U.) ; Choi, J.J. (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M. (UNIST, Ulsan) ; Cladé, P. (Paris, Lab. Kastler Brossel) ; Comini, P. (IRFU, Saclay) ; Crépin, P.P. (Paris, Lab. Kastler Brossel) ; Crivelli, P. (Zurich, ETH) ; Dalkarov, O. (Lebedev Inst.) ; Debu, P. (IRFU, Saclay) ; Dodd, L. (Swansea U.) et al.
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. [...]
arXiv:2006.05966.- 2021-01-01 - 33 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 985 (2021) 164657 Fulltext: PDF;
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5.
Noninvasive Blood-Brain Barrier Opening in Live Mice / Choi, James J ; Pernot, Mathieu ; Small, Scott ; Konofagou, Elisa E
2006 - Published in : AIP Conf. Proc.: 829 (2006) , pp. 271-275 External link: Published version from AIP
In : 5th International Symposium on Therapeutic Ultrasound, Boston, MA, USA, 27 - 29 Oct 2005, pp.271-275
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6.
High Power 35 GHz Gyroklystron Amplifiers / Choi, J J ; McCurdy, A H ; Wood, F ; Kyser, R H ; Calame, J ; Danly, B G ; Levush, B ; Parker, R K
1998 External link: Published version from JACoW
In : 17th Particle Accelerator Conference, pp.3159
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7.
Experiments on the Beam Breakup Instability in Long-Pulse Electron Beam Transport Through RF Cavity Systems / Gilgenbach, R M ; Bosch, R A ; Ching, H ; Choi, J J ; Menge, P R ; Spencer, T A
1991 External link: Published version from JACoW
In : 14th IEEE Particle Accelerator Conference, San Francisco, CA, USA, 6 - 9 May 1991, pp.1827
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8.
Research on High Power Gyro-Klystron Amplifiers / Choi, J J ; Kim, H J ; Na, Y H ; Son, M H
2002
In : 21st International Linear Accelerator Conference, Gyeongju, Korea, 19 - 23 Aug 2002, pp.e-proc. TU460
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9.
Experimental Demonstration of High Power Millimeter Wave Gyro- Amplifiers / Blank, M ; Garven, M ; Calame, J P ; Choi, J J
1999 IEEE Published version, local copy: PDF;
In : 18th Biennial Particle Accelerator Conference, New York, NY, USA, 29 Mar - 2 Apr 1999, pp.e-proc. 1016
International Workshop on Pulsed RF Power Sources for Linear Colliders : RF '98, Pajaro Dunes, CA, USA, 5 - 9 Oct 1998, pp.165-171
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Se også: lignende forfatternavn
140 Choi, J
31 Choi, J -Y
66 Choi, J B
1 Choi, J D
80 Choi, J H
3 Choi, J M
1 Choi, J R
7 Choi, J S
4 Choi, J W
2 Choi, J Y
1 Choi, J-Y
32 Choi, J.
2 Choi, J.B.
1 Choi, J.H.
1 Choi, J.J.
1 Choi, J.S.
1 Choi, Jae-Hoon
1 Choi, Jae-Hyuk
1 Choi, Jae-Hyun
1 Choi, Jae-Wook
3 Choi, Jae-Young
5 Choi, Jaedong
3 Choi, Jaehyung
1 Choi, Jaeseok
1 Choi, Jaesik
1 Choi, Jaesok
1 Choi, Jaeyoung
6 Choi, Jai-Min
1 Choi, James J
1 Choi, Jeehye
3 Choi, Jeong Ryeol
5 Choi, Jeong Woon
1 Choi, JiHyeok
189 Choi, Jieun
3 Choi, Jihoon
82 Choi, Jin
1 Choi, Jin Hwa
4 Choi, Jin-Hyuk
5 Choi, Jinho
1 Choi, Jinhyuk
2 Choi, Jinmyung
1 Choi, Jinnil
1 Choi, Jinsook
2 Choi, Jinwon
1 Choi, Jinwoo
1 Choi, Jiwoong
9 Choi, Jong Bum
1 Choi, Jong Keun
1 Choi, Jong Y
2 Choi, Jongeun
2 Choi, Jongsoung
2 Choi, Jongsung
1 Choi, Joo-Ho
1 Choi, Joon-Young
1 Choi, Joongho
1 Choi, Joonhee
2 Choi, Joseph S
1 Choi, Jun Won
26 Choi, Jun-Hwan
26 Choi, Jun-hwan
2 Choi, Junesang
3 Choi, Jung Han
1 Choi, Jung J
3 Choi, Jung-Kyoo
3 Choi, Jung-Woo
1 Choi, Jungmin
443 Choi, Junho
140 choi, J
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