Events at Physics |
Events During the Week of August 25th through September 1st, 2024
Sunday, August 25th, 2024
- Academic Calendar
- Graduate School Summer 2024: Doctoral degree deadline
- Time: 11:55 pm - 12:55 am
- Abstract: CONTACT: 262-2433, gsacserv@grad.wisc.edu
Monday, August 26th, 2024
- Academic Calendar
- Graduate School Fall 2024: Fall Degree Window Period begins
- Abstract: CONTACT: 262-2433, gsacserv@grad.wisc.edu
- Graduate Program Event
- Incoming PhD Orientation and Welcome
- Time: 9:00 am - 12:30 pm
- Place: 2241 Chamberlin
- Speaker: various
- Host: Sharon Kahn
- Preliminary Exam
- Nonlinear X-ray Optics for Transition Metal Chemistry and Coherent X-ray Spectroscopy
- Time: 10:00 am - 12:00 pm
- Place: B343 Sterling Hall;
- Speaker: Zain Abhari, Physics PhD Graduate Student
- Abstract: My thesis work encompasses two main projects: building and commissioning an XUV femtosecond transient absorption spectroscopy tabletop instrument and designing new nonlinear spectroscopy and imaging techniques in the hard X-ray domain utilizing stimulated X-ray emission.
Advancements in tabletop XUV sources driven by high harmonic generation have enabled ultrafast, element-specific measurements outside large-scale X-ray free electron laser facilities. Despite their potential, these sources were previously limited to academic labs specializing in nonlinear optics and ultrafast laser systems. To increase access across other scientific disciplines, we established an XUV femtosecond absorption spectroscopy tabletop (XFAST) instrument at the University of Wisconsin – Madison as a national user facility. My contributions included constructing the vacuum system and configuring the optical pump line. In addition to being the instrumentation consultant for XFAST, I have a focus in designing nonlinear hard X-ray spectroscopy techniques and new X-ray sources.
Furthering our understanding of electron dynamics and obtaining structural information from materials necessitates ultrashort X-ray pulses on femtosecond or attosecond timescales. We pursue two methods to achieve intense, ultrafast X-ray pulses: stimulated emission for femtosecond coherent hard X-ray pulse pairs, and superradiance for hard X-ray attosecond spikes. Recently, we designed and demonstrated a femtosecond X-ray pulse pair spectrometer using stimulated emission, encoding ultrafast dynamics information in CCD image contrast. Superradiance, if observed in the hard X-ray regime, could offer powerful imaging capabilities, although distinguishing it from stimulated emission presents challenges. Our designed experiments aim to confirm superradiance's observation separately from stimulated emission. - Host: Uwe Bergmann
Tuesday, August 27th, 2024
- Wisconsin Quantum Institute
- Quantum Coffee Hour
- Time: 3:00 pm - 4:00 pm
- Place: Rm.5294, Chamberlin Hall
- Abstract: Please join us for the WQI Quantum Coffee today at 3PM in the Physics Faculty Lounge (Rm.5294 in Chamberlin Hall). This series, which takes place approximately every other Tuesday, aims to foster a casual and collaborative atmosphere where faculty, post-docs, students, and anyone with an interest in quantum information sciences can come together. There will be coffee and treats.
Wednesday, August 28th, 2024
- Graduate Program Event
- All grad lunch/recess
- Time: 11:30 am - 1:00 pm
- Place: Bascom Hill (rain location: Birge Hall atrium)
- Abstract: All graduate students (MS and PhD, new and continuing) are invited to join for a picnic lunch. Watch for an opportunity to RSVP in the weeks leading up to the event.
- Host: Sharon Kahn
Thursday, August 29th, 2024
- Graduate Program Event
- Qualifying Exam - Classical Mechanics
- Time: 9:00 am - 10:30 am
- Place: 2241 Chamberlin
- Host: Sharon Kahn
- Graduate Program Event
- Qualifying Exam - Statisical Mechanics
- Time: 11:30 am - 1:00 pm
- Place: 2241 Chamberlin
- Host: Sharon Kahn
Friday, August 30th, 2024
- Graduate Program Event
- Qualifying Exam - Electricity and Magnetism
- Time: 9:00 am - 10:30 am
- Place: 2241 Chamberlin
- Host: Sharon Kahn
- Graduate Program Event
- Qualifying Exam - Quantum Mechanics
- Time: 11:30 am - 1:00 pm
- Place: 2241 Chamberlin
- Host: Sharon Kahn