Amit Samanta

Team Leader

Center for Free-Electron Laser Science (CFEL)
Deutsches Elektronen-Synchrotron DESY
Notkestrasse 85 (building 99, room O3.003)
22607 Hamburg
Germany

COMOTION

amit.samanta@cfel.de

+49-40-8998-86085

Research

Our current research is focused on method development and implementation to bring large biomolecules (peptides, proteins, viruses, cells) into gas phase and rapidly cool them to ultra-cold temperature using buffer gas cooling technique. This will provide us intense, collimated beam of cold (~4 K) and controlled biomolecules and nanoparticles for atomic resolution diffractive imaging using X-ray free-electron laser (XFEL). We are also working on 'techniques to control' cryogenically-cooled bio-nanoparticles using electric or optical fields. This provides the prerequisites for future time-resolved studies of ultrafast biochemical dynamics, which require well-defined starting states to controllably and reliably trigger specific dynamic processes of interest

Curriculum Vitae

2019–present	CMI COMOTION team leader at Center for Free Electron Laser Science, DESY, Hamburg
2016–2019	Research associate at Center for Free Electron Laser Science, DESY, Hamburg
2011–2016	Postdoctoral Researcher at the University of Southern California, Los Angeles, USA
2006–2011	PhD Student at Indian Association for the Cultivation of Science, Kolkata, India

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