Arcminute Cosmology Bolometer Array Receiver

ACBAR detector array
Holzapfel Group | ACBAR | APEX | BICEP | BIMA Anisotropy | CBI | DASI | SZ Clusters | South Pole 'Scope | UCB Physics

Science Goals

Instrument Description

Project Team


2008 Data

2006 Data

2002 Data

2002 Press Release



Project Overview

The Arcminute Cosmology Bolometer Array Receiver (ACBAR) is a sensitive multi-frequency reciever designed to measure slight temperature differences in the Cosmic Microwave Background. The Cosmic Microwave Background (CMB) is the faint afterglow of the Big Bang which formed the universe. Most of these temperature differences in the CMB resulted from quantum fluctuations which grew during the rapid expansion of the very early universe while some of them resulted from the interaction of CMB photons with clusters of galaxies via the Sunyaev-Zel'dovich effect. Observations of both types of CMB fluctuations can tell us about the composition and evolution of the universe.

The ACBAR instrument is based out of U.C. Berkeley (W.L. Holzapfel, co-PI) and Case Western Reserve University (J. Ruhl, co-PI).

ACBAR was supported by funds from the Center for Astrophysical Research in Antarctica, a National Science Foundation Science and Technology Center. Operational support was provided by the United States Antarctic Program.

Copyright Holzapfel Group, 2002 Page last modified November 7, 2006