A fast low-noise charged-particle CVD diamond detector

Abstract

Abstract-This paper presents the design and test results of a charged-particle solid-state detector with ultrafast signal response based on polycrystalline chemical-vapor-deposition (pCVD) diamond as active detector material and a high-bandwidth RF amplifier. We tested the detector at the Indiana University Cyclotron Facility Bloomington, IN, in a proton beam with a kinetic energy ranging from 55 to 200 MeV. The detector signals showed an average pulsewidth of 1.38 ns, which enables single-particle counting at instantaneous rates approaching the gigahertz range. The detector operated with a signal-to-noise ratio of 7 : 1 for 200-MeV protons and a single-particle detection efficiency up to 99%.

Low-Power Amplifier-Discriminators for High Time Resolution Detection

“…After radiation induced degradation of the sensor, ballistic effect might affect signal to noise ratio of the electronic pixel channel. Possible alternative of sensors are being studied, such as diamond sensors [12]. The LCO circuit could also be an interesting amplifier-discriminator solution for a hybrid pixel detector using 3D silicon sensors, which could also lead to higher induced signal speed [13].…”

First test results of a high-speed beam conditions monitor for the atlas experiment

“…For the readout of the BCM detector we developed a lownoise implementation of a high-speed current amplifier, which was designed for a high-speed beam diagnostic using diamonds and is described in further detail in [6]. Current amplifiers have been successfully used with diamond detectors for heavy-ion detection and can provide output signals with the time characteristics required for the BCM [7].…”

The13C(n,α0)10Be cross section at 14.3 MeV and 17 MeV neutron energy

“…Diamond detectors based on CVD diamond can be efficiently used as neutron monitors due to the combination of such properties as: subnanosecond time response [1,2], high irradiation resistance [3,4], the possibility of discrimination of different particle interaction types [5,6]. The detection of fast neutrons with diamond detectors is achievable due to the nuclear reactions of neutrons with carbon nuclei [7].…”