Detectors and Focal Planes for the Cosmology Large Angular Scale Surveyor

Cosmic Microwave Background;CMB;CMB Polarization;Cosmology;Early Universe;Reionization;Gravitational Waves;Inflation;Cosmology Large Angular Scale Surveyor;CLASS;Detectors;Bolometers;Transition Edge Sensors;TES;Monocrystalline Silicon;Focal Planes;CE7;Physics

Ali, Aamir MBennett, Charles L ;

Johns Hopkins University

关键词: Cosmic Microwave Background;    CMB;    CMB Polarization;    Cosmology;    Early Universe;    Reionization;    Gravitational Waves;    Inflation;    Cosmology Large Angular Scale Surveyor;    CLASS;    Detectors;    Bolometers;    Transition Edge Sensors;    TES;    Monocrystalline Silicon;    Focal Planes;    CE7;    Physics;   

Others  :  https://jscholarship.library.jhu.edu/bitstream/handle/1774.2/60211/ALI-DISSERTATION-2017.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: JOHNS HOPKINS DSpace Repository

【 摘 要 】

The Cosmology Large Angular Scale Surveyor (CLASS) is a ground based telescope array designed to measure the large-angular scale polarization signal of the Cosmic Microwave Background (CMB). The large-angular scale CMB polarization measurement is essential for a precise determination of the optical depth to reionization, τ, (from the E-mode polarization) and a characterization of inflation from the predicted polarization pattern imprinted on the CMB by gravitational waves in the early universe (from the B-mode polarization). CLASS will characterize the primordial tensor- to-scalar ratio, r, to 0.01 (95% CL).This thesis focuses on the CLASS detectors and associated focal plane technologies which capture the image of the CMB. Chapter 1 introduces the theory of cosmic inflation and discusses the observational signature of IGWs and τ in the large-angular scalepolarization of the CMB. Chapter 2 discusses the CLASS experimental strategy and implementation. Chapter 3 introduces the CLASS detector architecture, focusing on how it meets the CLASS experimental requirements as well as an overview of its theoretical operation. Chapter 4 discusses the detector focal planes and environment, particularly those elements which affect the operation of the detector. Chapter 5 discusses the results of several experiments that characterized the CLASS detector performance. Finally, Chapter 6offers concluding remarks.