|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)
|136||July 2. 2018 (Monday) 3:00 PM||Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus||Dr. Peter Winter (Argonne National Laboratory)||High Precision Magnetic Field Measurement for the Muon g-2 Experiment|
|135||Jun. 1(Wed) 10:30 AM||BK21 Conference Room (#1318, E6-2)||Dr. Noriaki Horiuchi, Editor, Nature Photonics||Welcome to Nature Photonics|
|134||May. 11 (Fri.), 04:00 PM||E6-2. 1st fl. #1323||Dr. Nam Kim||암페어 단위 재정의와 단전자 펌프 소자 개발|
|133||April 26 (Tue), 4PM||#1323(1st Floor. E6-2)||Dr. Myung-Ho Bae, Korea Research Institute of Standards and Science||Transport spectroscopy for electronic bands in carbon-based nanomaterials with weak-bond contacts|
|132||Aug.12(Fri.) 10:00AM, 2022||E6-1 #1323||Dr. Moon Jip Park (Center for Theoretical Physics of Complex Systems, IBS)||Twisted Bilayer Magnets|
|131||3 PM, 12 Jun (Wed), 2019||Rm# 1323, E6-2||Dr. Minyoung You||The relation between free and interacting fermionic SPT phases|
|130||Sep. 29 (Thu), 4:00 PM||E6-2. #2501(2nd fl.)||Dr. Minu Kim, Institute for Basic Science, Seoul National University||Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?|
|129||Apr. 28 (Fri.), 04:00 PM||#1323 (E6-2. 1st fl.)||Dr. Minkyung Jung Research Institute, DGIST||Carbon nanotubes coupled to superconducting impedance matching circuits|
|128||July 30 (Tue), 4:00 PM||#1323, E6-2||Dr. Mingu Kang||Dirac fermions and flat bands in correlated kagome metals|
|127||Nov. 3 (Fri.), 2:30 PM||#1323 (1st fl., E6-2.)||Dr. MinChul Lee(Department of Applied Physics, Kyung Hee Univ.)||Quantum Resistor-Capacitor Circuit with Majorana Edge States|
|126||Sep. 10 (Tue.), 03:00 PM||E6-2. 1st fl. #1323||Dr. Mikhail Kiselev||Two-Stage Kondo Effect|
|125||Feb. 1 (Wed.), 2p.m.||#1323(E6-2. 1st fl.)||Dr. Michihisa Yamamoto, Department of Applied Physics, The University of Tokyo||Quantum electron optics using flying electrons|
|124||2015/11/23, 1:30PM||E6-2, #1323||Dr. Michael Park (Stanford University)||What's Beyond the Standard Model? Lessons from Run I and what might come in Run II|
|123||Jul. 08 (Fri.) 11:00 AM||#1323(E6-2. 1st fl.)||Dr. Michael Lawler(Binghampton Univ. / Cornell Univ.)||Isostatic magnetism|
|»||May 19, 2016 (Thur.) 3PM||May 19, 2016 (Thur.) 3PM,||Dr. Michael Betz, CERN||The CERN Resonant WISP Search: Development, Results and Lesson-Learned|
|121||2015/10/15, 10AM||E6-2, 5th fl. #5318||Dr. Mark D. Bird (Florida State University)||Development of Large-Bore, High Field Magnets at the NHMFL|
|120||Mar. 24 (Fri.), 2:30 PM||#1323 (1st fl. E6-2).||Dr. MahnSoo Choi||Topological Dynamics|
|119||October 26 (Fri.), 4:00 PM||#1323, E6-2||Dr. Kyusung Hwang||Coexisting triple-point and nodal-line topological magnons and thermal Hall effect in pyrochlore iridates|
|118||2015/07/16, 4PM||E6-2, 1318||Dr. Kyunghan Hong(MIT)||Next-generation ultrafast laser technology for nonlinear optics and strong-field physics|
|117||November 1 (Thu.), 16:00 PM||#1323, E6-2||Dr. KyeoReh Lee||Direct holography from a single snapshot|