Muhamed Amin

Research associate

Center for Free-Electron Laser Science (CFEL)
Deutsches Elektronen-Synchrotron DESY
Notkestrasse 85 (building 99, room O3.016)
22607 Hamburg
Germany

COMOTION

muhamed.amin@cfel.de

Research

My research is focused on modeling the sample delivery process starting from the injector till the imaging XFEL beam. I use Navier–Stokes equations and Lattice Boltzmann method combined with optical forces to model the optical trapping of nanoparticles to get highly focused particles beam. In addition, I study the electromagnetic interactions between the aligning laser and the nanoparticles.

Curriculum Vitae

2017–	Research associate, Center for Free Electron Laser Science, DESY, Hamburg
2014–2016	Postdoctoral researcher at the Lawrence Berkeley National Lab, CA, USA
2008–2013	PhD Student at the City University of New York, NY, USA
2006–2008	MA at the City College of New York, NY, USA
2000–2005	BEE at the Cairo University, Egypt

Publications

CFEL Home

Next seminars

No events scheduled.

Timepix3: single-pixel multi-hit energy-measurement behaviour

13 November 2024

The event-driven hybrid-pixel detector readout chip, Timepix3, has the ability to simultaneously measure the time of an event on the nanosecond timescale and the energy deposited in the sensor. However, the behaviour of the system when two events are recorded in quick succession of each other on the same pixel was not studied in detail previously. We present experimental measurements, circuit simulations, and an empirical model for the impact of a preceding event on this energy measurements, which can result in a loss as high as 70%. Accounting for this effect enables more precise compensation, particularly for phenomena like timewalk. This results in significant improvements in time resolution — in the best case, multiple tens of nanoseconds — when two events happen in rapid succession.

Keynote lecture at Sino-German Physics Conference

20 October 2024

Jochen presented a keynote lecture on CMI research at the 33rd Annual Meeting of the Chinese Society of Physicists in Germany (GCPD) in Jinan, Shadong, China. The lecture was well attained locally and, according to the organizers, followed by more than 10,000 people in the koushare online stream.

Recent Publications