FASER is a new experiment aimed at searching for new light weakly-interacting long-lived particles and studying high-energy neutrino interactions in the very forward region of LHC collisions at CERN. ...The experimental setup is located 480 meters downstream from the ATLAS interaction point, aligned with the beam collision axis. The FASER detector comprises four identical tracker stations made from silicon microstrip detectors. All tracker stations were installed in the LHC complex in 2021. After the commissioning, FASER has been taking physics data since the start of LHC Run 3 in July 2022. In 2022 and 2023, we have successfully collected data from 68 fb−1 (inverse femtobarns) of proton–proton collisions at a center-of-mass energy of 13.6 TeV. This paper describes the design, construction and performance with early data of the silicon tracker stations.
The recent status of the FASER detector Inada, Tomohiro
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
10/2022, Volume:
1040
Journal Article
Peer reviewed
FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching for light, extremely weakly-interacting particles at the LHC. Such particles may be produced in the high-energy ...collisions at the LHC and then decay to visible particles in FASER, which is placed 480 m downstream of the ATLAS interaction point. FASER, also includes a sub-detector, FASERν, designed to detect neutrino’s produced in the LHC collisions and to study their properties. In this paper, we introduce each component of the FASER detector that has been installed into the LHC during Long Shutdown 2 and the current status of the commissioning.
In recent years, more than 10 million tons of industrial wastes are discarded annually. Those wastes are mainly composed of plastic, glass and metals which are the materials massively used in ...automobiles, electric and electronic products. It is well known that industrial waste contain precious metals like gold and have a great value of reutilization. Therefore, technology to properly separate the waste by their types of subject is very important for recycling industry. In this study, we have developed a new separation method by use of acoustic levitation phenomenon in a standing wave field. Unlike the conventional methods such as centrifugal particle separation or magnetic separation, this method enables to sort subjects by their densities, without relying on other material properties including size, magnetism and weight. First described in this paper is a theoretical analysis of levitation force exerted on an object to derive its trajectory in a standing wave field. It is found that the motion of the object is governed by its density and the strength of acoustic field. Based on this finding, we developed a prototype of separation system with twin-transducers and a belt conveyer. As a result of test to separate a mixture of SiO2 and Fe particles, 62wt% SiO2 is captured at node side while 72wt% Fe is captured at anti-node side. Finally, the prototype is used to repeatedly separate the chipped waste of actual OA equipment. Its density was increased about 150%.
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