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This work aims at studying photoionization dynamics from atoms and surfaces at attose time scales. The work was based on development and applications of a high repetition rate High-order Harmonic Generation (HHG) light source that utilizes Optical Parametric Amplification (OPA) laser technology. The laser system delivers few-cycle pulses in the near infrared (IR) at a repetition rate of 200 kHz.
Photomultiplier tube (PMT) nonlinearities relevant for single shot high-speed lifetime phosphor thermometry were investigated by simulating decay curves with a light emitting diode (LED) at repetition rates between 1 Hz and 10 kHz. The PMT gain, LED decay time, and background radiant flux were also varied to investigate their impact on the measured decay time error. Errors in the measured decay ti
NYTT FRÅN LUNDS UNIVERSITET Mejlutskick på svenska och engelska som vänder sig till fakultetskommunikatörer vid Lunds universitet för vidarespridning i fakultets- och institutionskanaler – Nr 20 v 22 - 2021. UNIVERSITETSGEMENSAMT Lönerevisionen drar ut på tiden Förhandlingarna med anledning av lönerevisionen pågår fortfarande. Tyvärr kan det konstateras att det nu har dragit ut så långt i tiden at
https://www.cec.lu.se/sites/cec.lu.se/files/2021-06/LU-gemensamt%20Mejlutskick%20Nr%2020-v22-2021.pdf - 2026-07-07
Background: Indoor lighting, exposure to outdoor daylight, physical activity and sleep interact to influence functioning, mood and cicadian rhythm. Older adults (≥ 65 years), who often spend more time at home, are less physically active and experience more sleep problems, could benefit from strategies to support behavioural change and self-managed modifications in the home. The study’s primary objBackgroundIndoor lighting, exposure to outdoor daylight, physical activity and sleep interact to influence functioning, mood and cicadian rhythm. Older adults (≥ 65 years), who often spend more time at home, are less physically active and experience more sleep problems, could benefit from strategies to support behavioural change and self-managed modifications in the home. The study’s primary objec
An experimental and computational study of the near-wall combustion in a Homogeneous Charge Compression Ignition (HCCI) engine has been conducted by applying laser based diagnostic techniques in combination with numerical modeling. Our major intent was to characterize the combustion in the velocity- and thermal boundary layers. The progress of the combustion was studied by using fuel tracer LIF, t
