title: Design, realization, and characteristics of a transition edge bolometer for sub-millimeter wave astronomy.
abstract: The large array bolometer camera is scheduled to succeed its semiconducting predecessor at the Atacama pathfinder experiment. It shall be an array of 300 transition edge sensors operated at a temperature of about 0.25 K, provided by a (3)He evaporation cooler and a pulse tube refrigerator. The instrument will be read out by a superconducting quantum interference device time domain multiplexer. The design and realization of a suitable detector for this instrument is described. Based on sensitivity demands derived from the background limit, the thermal and electrical designs for a spider-web bolometer are deduced. The theoretical predictions are compared to experimental results. The pixel design yields a background-limited performance for background loads corresponding to blackbody sources between 77 K and 300 K and a partially effective anti-aliasing filter for the intended multiplexed readout.
authors.affiliation: Institute of Photonic Technology, D-07745 Jena, Germany. torsten.may@ipht-jena.de
authors.forename: Torsten
authors.initials: T
authors.lastname: May
authors.forename: Vyatcheslav
authors.initials: V
authors.lastname: Zakosarenko
authors.forename: Ernst
authors.initials: E
authors.lastname: Kreysa
authors.forename: Walter
authors.initials: W
authors.lastname: Esch
authors.forename: Solveig
authors.initials: S
authors.lastname: Anders
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Gemuend
authors.forename: Erik
authors.initials: E
authors.lastname: Heinz
authors.forename: Hans-Georg
authors.initials: HG
authors.lastname: Meyer