Design and Fabrication of a Radiation-Hard 500-MHz Digitizer Using Deep Submicron Technology

Gan, K.K. ; Johnson, M.O. ; Kass, R.D. ; Moore, J.

The Ohio State University

关键词: Feedback;    Digitizers;    Shielding;    43 Particle Accelerators;    Cables;   

DOI  :  10.2172/937069
RP-ID  :  DOE/ER/41277
RP-ID  :  FG02-03ER41277
RP-ID  :  937069

美国|英语

来源: UNT Digital Library

【 摘 要 】

The proposed International Linear Collider (ILC) will use tens of thousands of beam position monitors (BPMs) for precise beam alignment. The signal from each BPM is digitized and processed for feedback control. We proposed the development of an 11-bit (effective) digitizer with 500 MHz bandwidth and 2 G samples/s. The digitizer was somewhat beyond the state-of-the-art. Moreover we planned to design the digitizer chip using the deep-submicron technology with custom transistors that had proven to be very radiation hard (up to at least 60 Mrad). The design mitigated the need for costly shielding and long cables while providing ready access to the electronics for testing and maintenance. In FY06 as we prepared to submit a chip with test circuits and a partial ADC circuit we found that IBM had changed the availability of our chosen IC fabrication process (IBM 6HP SiGe BiCMOS), making it unaffordable for us, at roughly 3 times the previous price. This prompted us to change our design to the IBM 5HPE process with 0.35 µm feature size. We requested funding for FY07 to continue the design work and submit the first prototype chip. Unfortunately, the funding was not continued and we will summarize below the work accomplished so far.