Arbitrary order transfer maps for RF cavities

Current modeling of transfer maps for superconducting RF cavities at CEBAF includes only linear effects. Here we extend the transfer mapping modeling capability to include arbitrary order field information generated from the MAFIA field data. We include coupler kicks, normal and skew quadrupole focussing and higher order effects

Stimulating inference-making in second grade children when reading and listening to narrative texts

Inference-making is a central element of successful reading comprehension, yet provides a challenge for beginning readers. Text decoding takes up cognitive resources which prevents beginning readers from successful inference-making and compromises reading comprehension. Listening does not require any decoding and could therefore offer a less demanding context to practice inference-making. The present study examined whether stimulating inference-making in a listening context is more effective and less cognitively demanding for beginning readers than a reading context. In three experiments, Dutch second grade children read two narratives and listened to two narratives. Inference-making was stimulated by asking them inferential questions during reading or listening and we compared this to a no-questioning control condition. After each narrative, we measured cognitive load and comprehension. It was expected that inferential questioning would increase cognitive load and negatively affect reading comprehension, but positively affect listening comprehension. The results indeed showed that inferential questioning increased cognitive load, but did not lead to differences in performance on open-ended comprehension questions (Experiment 1 & 2). When measuring comprehension with a free recall protocol (Experiment 3), we found a negative effect on total recall in both the reading and listening conditions. Taken together, we found no support for the hypothesized interaction. This raises questions about the effectiveness of inferential questioning for reading and listening comprehension of beginning readers, and whether listening is a good modality for improving inference-making

Description of the RHIC Sequencer System

The movement of the Relativistic Heavy Ion Collider (RHIC) through its various states (eg. injection, acceleration, storage, collisions) is controlled by an application called the Sequencer. This program orchestrates most magnet and instrumentation systems and is responsible for the coordinated acquisition and saving of data from various systems. The Sequencer system, its software infrastructure, support programs, and the language used to drive it are discussed in this paper. Initial operational experience is also described.Comment: Poster paper for ICALEPCS 2001 conference, San Jose, USA, (THAP062), 3 pages in PDF forma

Design and implementation of a slow orbit control package at Thomas Jefferson National Accelerator Facility

The authors describe the design and implementation of a C++ client/server based slow orbit and energy control package based on the CDEV software control bus. Several client applications are described and operational experience is given