Speaker
Description
The Alpha Magnetic Spectrometer (AMS) was installed on the
International Space Station in 2011. This particle physics experiment
is designed to measure the composition of cosmic rays in low Earth
orbit, with the primary goal of distinguishing between antimatter and
matter. AMS is equipped with a permanent magnet and multiple detectors,
allowing it to analyze incoming cosmic rays with rigidities ranging
from 1 GV to several TV.
To maximize the remaining data collection period before the ISS planned
retirement in 2030, the AMS collaboration plans to install in 2026 an
additional silicon tracking layer, on top of the existing instrument.
This tracking layer, L0, consists of two planes of silicon microstrip
detectors, each composed of 36 fundamental units called "ladders," with
a total effective detection area of 8 m². This upgrade will not only
increase the acceptance of multiple analysis channels by a factor of
three and extend the measurable energy range of AMS, but it will also
enhance the identification of incoming particles before they interact
with the detector material and undergo fragmentation.
To thoroughly validate the charge identification and spatial resolution
capabilities of L0 and its ladders, we conducted multiple beam tests at
CERN. These tests include beams of heavy ions and muons. In this work,
we will first introduce the relevant background information, with a
detailed discussion of the experimental setup used in the recent L0
beam tests. Specifically, we installed two sets of beam telescopes, one
upstream and one downstream with respect to the ladder to reconstruct
particle trajectories. This let us estimate the particles position at
the ladder location with a precision of approximately 2 µm. We also
exploited a charge detector to assist in analyzing the charge
resolution of the ladder in offline analysis by having a precise
reference. Finally, we will present and discuss the preliminary results
from these L0 beam tests.
| Eligibility for "Best presentation for young researcher" or "Best poster for young researcher" prize | Yes |
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