TY - CONF AU - Benford, Dominic AU - Moseley, Harvey AU - Zmuidzinas, Jonas PY - 2009 DA - 2009// TI - Direct detectors for the Einstein inflation probe T2 - J. Phys.: Conf. Ser. BT - J. Phys.: Conf. Ser. SP - 012001 (1 to 49) VL - 155 IS - 1 KW - KID KW - MKID KW - CMB AB - Here we review the principles of operation, history, present status, and future prospects for the primary candidate detectors for Cosmic Microwave Background (CMB) polarization studies. The three detector types we will discuss are semiconductor-based bolometers, superconducting transition edge sensor (TES) bolometer, and Microwave Kinetic Inductance Detectors (MKIDs). All of these detector types can provide the sensitivity to permit background-limited measurements of the CMB, but the ultimate selection of detectors will be largely determined by the ease of production and reliability of large arrays of such detectors. This paper describes the present state of development of these detectors, efforts to integrate them into large arrays, and the detector system developments necessary to enable a space CMB polarization mission. N1 - Recommended by Klapwijk ID - Benford_etal2009 ER -