16 research outputs found
A flexible GPU-accelerated radio-frequency readout for superconducting detectors
We have developed a flexible radio-frequency readout system suitable for a variety of superconducting detectors commonly used in millimeter and submillimeter astrophysics, including kinetic inductance detectors (KIDs), Thermal KID bolometers, and quantum capacitance detectors. Our system avoids custom FPGA-based readouts and instead uses commercially available software radio hardware for analog to digital converter chip/digital to analog converter chip and a GPU to handle real-time signal processing. Because this system is written in common C++/CUDA, the range of different algorithms that can be quickly implemented make it suitable for the readout of many others cryogenic detectors and for the testing of different and possibly more effective data acquisition schemes
A flexible GPU-accelerated radio-frequency readout for superconducting detectors
We have developed a flexible radio-frequency readout system suitable for a variety of superconducting detectors commonly used in millimeter and submillimeter astrophysics, including kinetic inductance detectors (KIDs), Thermal KID bolometers, and quantum capacitance detectors. Our system avoids custom FPGA-based readouts and instead uses commercially available software radio hardware for analog to digital converter chip/digital to analog converter chip and a GPU to handle real-time signal processing. Because this system is written in common C++/CUDA, the range of different algorithms that can be quickly implemented make it suitable for the readout of many others cryogenic detectors and for the testing of different and possibly more effective data acquisition schemes
Thermal Kinetic Inductance Detectors for millimeter-wave detection
Thermal Kinetic Inductance Detectors (TKIDs) combine the excellent noise
performance of traditional bolometers with a radio frequency multiplexing
architecture that enables the large detector counts needed for the next
generation of millimeter-wave instruments. In this paper, we first discuss the
expected noise sources in TKIDs and derive the limits where the phonon noise
contribution dominates over the other detector noise terms:
generation-recombination, amplifier, and two-level system (TLS) noise. Second,
we characterize aluminum TKIDs in a dark environment. We present measurements
of TKID resonators with quality factors of about at 80 mK. We also
discuss the bolometer thermal conductance, heat capacity, and time constants.
These were measured by the use of a resistor on the thermal island to excite
the bolometers. These dark aluminum TKIDs demonstrate a noise equivalent power
NEP = , with a knee at
0.1 Hz, which provides background noise limited performance for ground-based
telescopes observing at 150 GHz.Comment: 15 pages, 12 figure
Antenna-coupled thermal kinetic inductance detectors for ground-based millimeter-wave cosmology
We present our design for antenna-coupled thermal kinetic inductance detectors (TKIDs) designed for Cosmic Microwave Background (CMB) observations in the 150 GHz band. The next generation of telescopes studying the CMB will require large arrays of detectors on cryogenic focal planes to achieve high sensitivity at the cost of increased integration and readout complexity. TKIDs have demonstrated photon-limited noise performance comparable to traditional bolometers with a radiofrequency (RF) multiplexing architecture that enables the large detector counts needed. We characterize TKIDs fabricated for observing the CMB in a frequency band centered at 150 GHz and discuss the optical performance. These devices are a critical step towards fielding a Keck Array camera with 512 devices on the focal plane at the South Pole
Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018
The Bicep/Keck Array experiment is a series of small-aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial B-mode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-to-polarization (T → P) leakage in our latest data including observations from 2016 through 2018. This includes three years of Bicep3 observing at 95 GHz, and multifrequency data from Keck Array. Here we present band-averaged far-field beam maps, differential beam mismatch, and residual beam power (after filtering out the leading difference modes via deprojection) for these receivers. We show preliminary results of "beam map simulations," which use these beam maps to observe a simulated temperature (no Q/U) sky to estimate T → P leakage in our real data
Identificación de los procesos y selección de un proceso crÃtico para proponer una mejora de alto impacto en el departamento de planeamiento de la empresa Machu Picchu Foods
Trabajo de Suficiencia ProfesionalEl presente proyecto busca proponer la implementación de un proceso de mejora que traducido nos llevará a la evaluación, diseño y construcción del proceso más adecuado para el cumplimiento de las órdenes de compra
solicitadas por los clientes de la empresa Machu Picchu Foods SAC, de acuerdo a la metodologÃa Gestión de mejora de procesos logrando la optimización del mismo