|장소||May 19, 2016 (Thur.) 3PM,|
|일시||May 19, 2016 (Thur.) 3PM|
|연사||Dr. Michael Betz, CERN|
The CERN Resonant WISP Search:
May 19, 2016 (Thur.) 3PM, #5318(E6-2, 5th fl.)
Dr. Michael Betz, CERN
The "CERN Resonant WISP Search"(CROWS) probes the existence of WISPs using microwave techniques.
The heart of the table-top experiment are two high-Q microwave cavity resonators. The `emitting cavity` is driven by a power amplifier at 3 GHz, resulting in the build-up of a strong electromagnetic field inside. The `receiving cavity` is placed in close vicinity and connected to a sensitive microwave receiver.
Most theories predict a weak coupling between the two cavities due to a Photon to WISP conversion process. CROWS tries to observe that coupling, while mitigating electromagnetic crosstalk with a high-end (~ 300 dB) electromagnetic shielding enclosure for the receiving part of the experiment.
Although no WISPs were detected in the most sensitive measurement-runs in 2013, a previously unexplored region in the parameter space was opened up. For `Hidden Sector Photons`, a prominent member of the WISP family, the result corresponds to an improvement in sensitivity over the previous laboratory exclusion limit by a factor of ~7.
This talk shall give a brief introduction to WISPs, the experimental search efforts worldwide and then focus on the design and development of the CROWS experiment, which happened in the framework of the authors PhD.
The encountered engineering challenges and their solutions will be highlighted. This includes the high performance EMI shielding (≈ 300 dB through several layers), operating electronics in strong (3 T) magnetic fields, optical signal transmission and high sensitivity (P < 1E-24 W) microwave signal detection. The operation procedure and the lessons learned during various experimental runs are shown. Furthermore, several ideas are proposed, on how to improve the experiment and its sensitivity further.
Contact: T.8166(CAPP Administration Office)
|공지||Sep.22 2022||E6-1 #1323||2022 가을학기 응집물리 및 광학 세미나 전체 일정|
|296||Aug. 16 (Wed.), 4 PM||#1322 (E6-2. 1st fl.)||Prof. Noejung Park (UNIST)||Phonon-driven spin-Floquet valleytro-magnetism|
|295||August. 14th (Wed.), 4:00PM,||Rm. 1323, E6||Prof. Nicolas Treps||Quantum Optics, at the heart of quantum metrology and quantum information|
|294||October 17 (Thu.), 16:00 PM||#1323, E6-2||Prof. Namkyoo Park||Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing|
|293||DEC. 27 (Thu), 04:00 PM||E6-2. 1st fl. #1323||Prof. Na Young Kim||Quantum Innovation (QuIN) Laboratory|
|292||June 4 (Tue.), 5:00 PM||#1323, E6-2||Prof. Minsu Kim||Stochastic nature of bacterial eradication using antibiotics|
|291||2015/06/03, 12PM||Room 101, E11||Prof. Min-Kyo, Seo & Hansuek, Lee(KAIST)||The First Wednesday Multidisciplinary Forum|
|290||Nov. 10th(Thu) 4 p.m.||E6-2. #1323(1st fl.)||Prof. Min Seok Jang, Electrical Engineering, KAIST||Low Dimensional Active Plasmonics and Electron Optics in Graphene|
|289||2018년 9월 7일 (금), 3PM||학술문화관 (E9), 2층 양승택 오디토리움||Prof. Martin Head-Gordon, UC Berkeley||Recent developments in density functional theory: From new functionals to the nature of the chemical bond|
|288||Apr. 9 (Fri.), 10:00 AM||Zoom webinar||Prof. Marko Loncar (Harvard University, USA)||Integrated Lithium Niobate Photonics|
|287||Apr. 19(Tue.), 2PM||#1323(E6-2. 1st fl.)||Prof. Mark Koepke, Department of Physics and Astronomy, West Virginia University, USA||Nonlocal collisional electron transport in partially ionized plasma generation, structure, and stability|
|286||November 28 (Thu.), 16:00 PM||#1323, E6-2||Prof. Kyung Taec Kim||Generation of coherent EUV emissions using ultrashort laser pulses|
|285||May 20(Fri.) 11:00||E6-1 #1323||Prof. Kwanpyo Kim (Department of Physics, Yonsei University)||(응집물리 세미나) Exploration of new polymorphs in van der Waals crystals|
|284||May 9 (Thu.), 16:00 PM||#1323, E6-2||Prof. Kwang Geol Lee||Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters|
|283||May 9 (Thu.), 16:00 PM||#1323, E6-2||Prof. Kwang Geol Lee||Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters|
|282||February 12(Web.)||E6-2, #5318||Prof. Kunio Kaneta||From inflation to new weak-scale|
|281||October 24 (Wed.), 10:30 AM||E6-1, Lecture Room 1501(1F)||Prof. Kerry J. Vahala||Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers|
|280||June 14 (THU), 10:00 AM||E6-2, 2nd fl. #2502||Prof. Kenji Toyoda||Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation|
|279||DEC. 16~18 (Sun~Tue)||E6-2. 1st fl. #1323||Prof. Keisuke Totsuka||Lectures on 2d Conformal Field Theory|
|278||MAR. 26 (TUE), 0300 PM||E6-2. 2st fl. #2501||Prof. Jung Hoon Han||Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets|
|277||June 3rd, Fri. 9:30 AM||Online seminar||Prof. Juejun Hu ( Massachusetts Institute of Technology)||(Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics|