High Resolution Silicon Strip Detectors for portable mass spectrometry

用于便携式质谱分析的高分辨率硅条检测器

• 批准号: ST/M007243/1
• 负责人: Gianluigi Casse
• 金额: $ 6.24万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FM007243%2F1
• 关键词: Resolution; Silicon; Strip; Detectors; portable

We will develop a mass spectrometer based on high resolution micro-strip silicon detectors as a sensing element. This novel approach intends to significant improve the mass resolution and sensitivity with respect to current technology. It aims to separate the different ions of the injected cold gas with an electric and magnetic field and subsequently accelerate the ions to sufficient energy to release detectable signal in the micro-strip detector. The instrument is comprised of a source of the cold gas to be analysed (sample), two evacuated drift sections and the sensing device. A state of the art cold ion source to feed in the proposed instrument will be built and provided by the project partner Q-T. The first drift section is about 5-10 cm long, with a low tuneable electric field (up to 10 V/cm) and a magnetic field to allow for separation of the ions with different mass during their drift toward the acceleration section. This acceleration section (with a length of 15-20 cm and an electric field of 500-1500 V/cm) allows impacting the ions onto the sensing element with sufficient energy to record the signal that determines the hit unambiguous position. The sensing element is a silicon micro-strip detector with 128 readout channel with a resolution of less than 10 micrometers. The clock rate of the electronics is 40MHz (or the integration time is 25 ns) and the total readout time for the sensor is 3.2 microseconds. The electric field in the mass separation section is tuned to optimise the mass separation in the region of interest. Scanning this electric field allows for studying a wide range of masses with this compact instrument.

我们将开发一种以高分辨率微带硅探测器作为传感元件的质谱仪。这种新颖的方法旨在显着提高现有技术的质量分辨率和灵敏度。它的目的是通过电场和磁场分离注入的冷气体中的不同离子，然后将离子加速到足够的能量以在微带检测器中释放可检测信号。该仪器由待分析的冷气体源（样品）、两个真空漂移部分和传感装置组成。项目合作伙伴 Q-T 将建造并提供用于拟议仪器的最先进的冷离子源。第一个漂移部分长约 5-10 厘米，具有低可调电场（高达 10 V/cm）和磁场，以允许不同质量的离子在向加速部分漂移期间分离。该加速部分（长度为 15-20 厘米，电场为 500-1500 V/cm）允许离子以足够的能量撞击到传感元件上，以记录确定撞击明确位置的信号。传感元件是硅微带探测器，具有128个读出通道，分辨率小于10微米。电子器件的时钟速率为 40MHz（或积分时间为 25 ns），传感器的总读出时间为 3.2 微秒。调整质量分离部分中的电场以优化感兴趣区域中的质量分离。扫描该电场可以使用这种紧凑的仪器研究各种质量。