Pizza Seminars

Summer Fellowships '23 Presentations 1/2

by Arturo Castaño (UAB Student), Emma Clarasó (Imperial College London Student), Roger Petit (UB Student)

Europe/Madrid
IFAE Seminar Room (IFAE)

IFAE Seminar Room

IFAE

Description

The IFAE Summer Fellowship Programme offers undergraduate students the possibility of spending the summer as a physics researcher. The program has been running for 7 years now.

In this seminar, 3 students will report on their work done in this one-month stay.

1. An extended emulator for the Ly-ɑ Forest 1D flux power spectrum

Emma Clarasó, Imperial College London Student

The Lyman-ɑ Forest is a series of absorption lines observed in the spectra of quasars caused by gas in the intergalactic medium (IGM) over a large redshift range. It is used in cosmology to study dark energy, inflation, and neutrino masses. Interpreting the data from the Ly-ɑ Forest requires precise modelling of the thermal and ionization states of the IGM. Running a simulation for every point in the parameter space is impossible, and therefore precise interpolation is necessary. Emulation techniques employing a neural network architecture are used to perform this interpolation, enabling rapid predictions of the 1D Ly-ɑ flux power spectrum. During my month-long internship, I worked on a method to improve the precision of the emulator on the smaller range of scales.

2. Analysis of LST-1 mispointing in Crab Nebula observations

Roger Petit, UB Student

In the paper presenting the observations of the Crab Nebula with LST-1, a small discrepancy is seen between the expected and the observed point-spread function of the telescope. Nevertheless, the data is theoretically consistent with a variable Gaussian mispointing of 0.025°, so we conduct an analysis of this mispointing based on the data to investigate its nature and to adjust the obtained data. This analysis leads to a significant improvement in the deviation of the data regarding the vertical axis of the camera within a 20-minute observation run.

 

3. Experimental study of Application Specific Integrated Circuits (ASICs) for the High Energy cosmic-Radiation Detection (HERD)

Arturo Castaño, UAB Student

The High Energy cosmic-Radiation Detection (HERD) is a space telescope being designed to observe high-energy gamma rays and cosmic rays. Composed of four major layers (SCD, PSD, FIT, Calo), I personally worked on testing the BETAs, which are the ASIC for the PSD and the FIT designed to generate a trigger signal whenever a particle or a gamma-ray arrives into the telescope. Many problems were found, such as repetitions in the acquired data, mixed values, shifting in the bit values or a trigger map not properly working. My main work revolved around the analysis of those problems as well as helping to solve them.

Organized by

Giada Caneva, Elia Bertoldo, Clara Fernandez Castañer

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×