A high precision pulse generation and stabilization system for bolometric experiments
A high precision pulse generation and stabilization system for bolometric experiments
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DOI：
10.1088/1748-0221/13/02/p02029
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发表时间：
2018-02-01
影响因子：
1.3
通讯作者：
Pessina, G.
中科院分区：
文献类型：
--
作者：
Alfonso, K.;Carniti, P.;Pessina, G.
寻找罕见事件的测辐射热实验通常需要极低的放射性背景，以防止假信号模仿感兴趣的信号，破坏设备的灵敏度。在这种情况下，放射源不能用于产生已知信号以在数据采集期间校准测量的能谱。在本文中，我们提出了一种仪器设计产生超稳定和非常精确的校准脉冲，可用于稳定的数据采集过程中的辐射热计的响应。该仪器的特点是存在多个输出，一个完全可编程的脉冲宽度和幅度和一个专用的菊花链光学触发线。它可以通过CAN总线协议进行远程控制和监控。在1 MeV的20 eV半高宽的顺序的能量分辨率（2 eV半高宽在10 keV）和0.1 ppm/摄氏度的顺序的热稳定性已经实现。该装置还可以提供可调功率，以补偿低温实验中通常发生的低频热波动。
Bolometric experiments searching for rare events usually require an extremely low radioactive background to prevent spurious signals from mimicking those of interest, spoiling the sensitivity of the apparatus. In such contexts, radioactive sources cannot be used to produce a known signal to calibrate the measured energy spectrum during data taking. In this paper we present an instrument designed to generate ultra-stable and very precise calibrating pulses, which can be used to stabilize the response of bolometers during data taking. The instrument is characterized by the presence of multi-outputs, a completely programmable pulse width and amplitude and a dedicated daisy-chained optical trigger line. It can be fully controlled and monitored remotely via CAN bus protocol. An energy resolution of the order of 20 eV FWHM at 1MeV (2 eV FWHM at 10 keV) and a thermal stability of the order of 0.1 ppm/degrees C have been achieved. The device can also provide an adjustable power to compensate the low frequency thermal fluctuations that typically occur in cryogenic experiments.