The Data Acquisition System for a Kinetic Inductance Detector

21st International Conference on Computing in High Energy and Nuclear Physics

物理学;计算机科学

Branchini, P.^1 ; Budano, A.^1 ; Capasso, L.^1 ; Marchetti, D.^1,2

INFN Sezione di Roma, Tre Via Della, Vasca Navale

84, Italy^1

Scuola di Dottorato in Fisica della Terza, Universita di Roma, Italy^2

关键词: Data acquisition system;    Front end electronics;    Incident radiation;    Kinetic inductance detectors;    PCI Express bus;    Quasi particles;    Read-out data;    Stimulus signals;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/664/8/082007/pdf
DOI  :  10.1088/1742-6596/664/8/082007

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The Data Acquisition System (DAQ) and the Front-End electronics for an array of Kinetic Inductance Detectors (KIDs) are described. KIDs are superconductive detectors, in which electrons are organized in Cooper pairs. Any incident radiation could break a pair generating a couple of quasi-particles that increase the inductance of the detector. The DAQ system we developed is a hardware/software co-design, based on state machines and on a microprocessor embedded into an FPGA. A commercial DAC/ADC board is used to interface the FPGA to the array of KIDs. The DAQ system generates a Stimulus signal suitable for an array of up to 128 KIDs. Such signal is up-mixed with a 3 GHz carrier wave and it then excites the KIDs array. The read-out signal from the detector is down-mixed with respect to the 3 GHz sine wave and recovered Stimulus is read back by the ADC device. The microprocessor stores read out data via a PCI express bus (PCIe) into an external disk. It also computes the Fast Fourier Transform of the acquired read out signal: this allows extrapolating which KID interacted and the energy of the impinging radiation. Simulations and tests have been performed successfully and experimental results are presented.