PuMaII：用于WSRT的宽带脉冲星机
PuMaII: A wide band pulsar machine for the WSRT
摘要：
Pulsar Machine II（PuMa II）是Westerbork综合射电望远镜（WSRT）新的灵活的脉冲星处理后端系统，专门设计用于利用升级后的WSRT。该仪器基于运行Linux操作系统的计算机集群，具有最少的定制硬件。最大160 MHz模拟带宽采样为8 × 20 MHz子带，8位分辨率可以记录在连接到单独的计算机节点的磁盘上。数据的处理是在额外的32个节点，允许近实时相干去色散在WSRT观察到的大多数雷达。这使脉冲星观测的带宽增加了一倍，并使相干去色散的使用带宽比WSRT以前可能的带宽大8倍。PuMa II是目前使用的最宽带宽的相干去色散机器之一，最大时间分辨率为50 ns。该系统现在经常用于高精度脉冲星定时研究、偏振研究、单脉冲工作和各种其他观测工作。
英文摘要：
The Pulsar Machine II (PuMa II) is the new flexible pulsar processing backend system at the Westerbork Synthesis Radio Telescope (WSRT), specifically designed to take advantage of the upgraded WSRT. The instrument is based on a computer cluster running the Linux operating system, with minimal custom hardware. A maximum of 160 MHz analogue bandwidth sampled as 8X20 MHz subbands with 8-bit resolution can be recorded on disks attached to separate computer nodes. Processing of the data is done in the additional 32-nodes allowing near real time coherent dedispersion for most pulsars observed at the WSRT. This has doubled the bandwidth for pulsar observations in general, and has enabled the use of coherent dedispersion over a bandwidth eight times larger than was previously possible at the WSRT. PuMa II is one of the widest bandwidth coherent dedispersion machines currently in use and has a maximum time resolution of 50ns. The system is now routinely used for high precision pulsar timing studies, polarization studies, single pulse work and a variety of other observational work.
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