http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Tomoaki Ikegami (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Thermal analysis of carbon nanotube film irradiated by a pulsed laser
Toshiyuki Nakamiya,Tsuyoshi Ueda,Tomoaki Ikegami,Kenji Ebihara,Ryoichi Tsuda 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
The prepared multi-walled carbon nanotubes (MWCNTs) lm was mounted on the holder and the lm surface was ashed with asingle pulse of Nd:YAG laser (k = 532 nm) or a pulsed KrF excimer laser (k face damage was measured by inspecting the surface morphology. The dynamics of pulsed nanosecond laser heating process was sim-ulated by the solution of the one-dimensional heat conduction equation. The nite element method (FEM) was applied to solve theequation. The damage threshold energy density for MWCNTs lms ashed by a pulsed Nd:YAG laser were in the range 650 mJ/cm2and 790 mJ/cm2. At the laser uence of 790 mJ/cm2 with Nd:YAG laser, the surface reached the maximum temperature 913.C a t13 ns. Moreover, the Raman spectroscopy of MWCNTs lms before and after irradiation were measured. Graphitization occurredon the sample after irradiation over the threshold energy of surface damage.
-
Sang-Moo Park,Kenji Ebihara,Tomoaki Ikegami,Boong-Joo Lee,Kyung-Bum Lim,신백균 한국물리학회 2007 Current Applied Physics Vol.7 No.5
In this work, indium-tin-oxide (ITO) electrode in organic light emitting device (OLED) was modified by using an O2 plasma treatment and plasma polymerized thiophene buffer layers were inserted between ITO (anode) and organic layer in order to improve the hole injection efficiency. Furthermore, electron injection to cathode (Al) in the test OLED seemed to be improved due to introduction of quantum well in the cathode. The plasma-polymerized thiophene buffer layer on the O2 plasma-treated transparent ITO electrode seemed to result in formation of a stable interface and consequently, reduction the hole mobility, which in turn caused enhanced recombination of hole and electron in the emitting layer. Compared with the test device without buffer layer, the turn-on voltage of the test device with the buffer layer was lowered by 1.0 V.
-
Design and Delivery of Beam Monitors for the Energy-upgraded Linac in J-PARC
Akihiko Miura,Nobuo Ouchi,Hidetomo Oguri,Kazuo Hasegawa,Tomoaki Miyao,Masanori Ikegami 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.3
In the J-PARC (Japan Proton Accelerator Research Complex) linac, an energy-upgrade projecthas started to achieve a design beam power of 1 MW at the exit of the downstream synchrotron. To account for the significant beam parameter upgrades, we will use the newly-fabricated beammonitors for the beam commissioning. This paper discusses the design and assembly of the beamposition monitor, phase monitor, current monitor, transverse profile monitor, and beam loss monitorfor the energy-upgraded linac. We periodically installed the newly-fabricated monitors for theupgraded beam line, as well as for longitudinal matching, because of the frequency jump betweenthe original RF cavity and the newly-developed cavity. We employed two debunchers to correctfor momentum spread and jitter. To account for the new debunchers, we fabricated and installedadditional pairs of phase monitors in order to tune the debunchers to the adequate RF set point. Finally, we propose commissioning plans to support the beam monitor check. We will begin toestablish the 181-MeV operation to confirm the proper functioning of beam monitors. Herein, wewill examine the response to changes of the knobs that control the quadrupole magnets after theenergy upgrade. After proper functioning of the beam monitors is confirmed, we will use the newbeam monitors to establish the 400-MeV acceleration operation.
-
Tomofumi Maruta,Akihiko Miura,Hiroyuki Sako,Jun Tamura,Masanori Ikegami,Kenta Futatsukawa,Zhigao Fang,Tomoaki Miyao,Yong Liu 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.7
The Tohoku earthquake in March 2011 caused significant damage to the Japan Proton AcceleratorResearch Complex (J-PARC) linac and forced us to shutdown the accelerator for nearly nine months. After a significant effort for its restoration, we resumed beam operation of the J-PARC linac inDecember 2011. Since the resumption of beam operation, we have been suffering from beam-losseswhich were not observed before the earthquake. Tackling the beam-loss issues, we have finallyreached the same beam power for user operation as before the earthquake. In this paper, we presentour experience with the beam start-up tuning after the earthquake, with emphasis on beam-lossmitigation efforts.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
