Any Light Particle Search II - Status Overview

TL;DR

ALPS II is a sophisticated experiment at DESY aiming to detect WISPs through photon oscillations, with recent progress in optical cavities, detectors, and magnet setups to enhance its search capabilities.

Contribution

This paper provides an overview of the current status and recent developments in the ALPS II experiment, including detector development and magnet setup progress.

Findings

Successful setup of optical cavities

Development of single-photon TES detector

Progress in unbending HERA dipoles

Abstract

The Any Light Particle Search II (ALPS II) experiment (DESY, Hamburg) searches for photon oscillations into Weakly Interacting Sub-eV Particles (WISPs). This second generation of the ALPS light-shining-through-a-wall (LSW) experiment approaches the finalization of the preparation phase before ALPS IIa (search for hidden photons). In the last years, efforts have been put for the setting up of two optical cavities as well as characterization of a single-photon Transition-Edge Sensor (TES) detector. In the following, we put some emphasis on the detector development. In parallel, the setting up of ALPS IIc (search for axion-like particles), including the unbending of 20 HERA dipoles, has been pursued. The latest progress in these tasks will be discussed.