Publications (10)
Thin-disk laser multi-pass amplifier
K. Schuhmann, M. A. Ahmed, T. Graf +8
In the context of the Lamb shift measurement in muonic helium we developed a thin-disk laser composed of a Q-switched oscillator and a multi-pass amplifier delivering pulses of 150…
The proton radius puzzle
J. J. Krauth, K. Schuhmann, M. Abdou Ahmed +49
High-precision measurements of the proton radius from laser spectroscopy of muonic hydrogen demonstrated up to six standard deviations smaller values than obtained from electron-pr…
Diffusion of muonic hydrogen in hydrogen gas and the measurement of the 1 hyperfine splitting of muonic hydrogen
J. Nuber, A. Adamczak, M. Abdou Ahmed +46
The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen (p) with 1 ppm accuracy by means of pulsed laser spectroscopy…
Laser excitation of the 1s-hyperfine transition in muonic hydrogen
P. Amaro, A. Adamczak, M. Abdou Ahmed +43
The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen (p) with 1 ppm accuracy by means of pulsed laser spectroscopy…
Experiments towards resolving the proton charge radius puzzle
A. Antognini, K. Schuhmann, F. D. Amaro +34
We review the status of the proton charge radius puzzle. Emphasis is given to the various experiments initiated to resolve the conflict between the muonic hydrogen results and the…
Planar LAAPDs: Temperature Dependence, Performance, and Application in Low Energy X-ray Spectroscopy
L. Ludhova, F. D. Amaro, A. Antognini +25
An experiment measuring the 2S Lamb shift in muonic hydrogen mup is being performed at the Paul Scherrer Institute, Switzerland. It requires small and compact detectors for 1.9 keV…
The next generation of laser spectroscopy experiments using light muonic atoms
S. Schmidt, M. Willig, J. Haack +41
Precision spectroscopy of light muonic atoms provides unique information about the atomic and nuclear structure of these systems and thus represents a way to access fundamental int…
Muonic hydrogen cascade time and lifetime of the short-lived state
L. Ludhova, F. D. Amaro, A. Antognini +24
Metastable muonic-hydrogen atoms undergo collisional -quenching, with rates which depend strongly on whether the kinetic energy is above or below the ${2S}\to {2…
Thin-disk laser pump schemes for large number of passes and moderate pump source quality
K. Schuhmann, T. W. Hänsch, K. Kirch +6
Novel thin-disk laser pump layouts are proposed yielding an increased number of passes for a given pump module size and pump source quality. These novel layouts result from a gener…
Characterization of large area avalanche photodiodes in X-ray and VUV-light detection
L. M. P. Fernandes, F. D. Amaro, A. Antognini +14
The present manuscript summarizes novel studies on the application of large area avalanche photodiodes (LAAPDs) to the detection of X-rays and vacuum ultraviolet (VUV) light. The o…