1 Duke Global Health Institute, Duke University, 310 Trent Drive, Durham, NC 27710, USA; E-Mails: [email protected] (R.A.K.); [email protected] (A.L.); [email protected] (C.J.P.) 2 Nicholas School of the Environment, Duke University, 9 Circuit Drive, Durham, NC 27708, USA 3 National Institute for Medical Research, 2448 Barack Obama Drive, P.O. Box 9653, Dar es Salaam, Tanzania; E-Ma...

The Duke Free Electron Laser Laboratory currently operates two FELs: the OK-4/Duke Storage Ring FEL, and the Mark III IR FEL. Both of these systems were among the early adopters of the Experimental Physics and Industrial Control System (EPICS). The Mark III EPICS control system was completed and operational in September, 1993. The Duke Storage Ring was commissioned in November of 1994 using EPI...

Circa 1870, G. Zolotarev observed that the Legendre symbol (ap ) can be interpreted as the sign of multiplication by a viewed as a permutation of the set Z/pZ. He used this observation to give a strikingly original proof of quadratic reciprocity [2]. We shall not discuss Zolotarev’s proof per se, but rather a 2005 paper of W. Duke and K. Hopkins which explores the connection between permutation...

The Duke storage ring is a dedicated facility for the UV-VUV FEL operation. The low level computer control system for the Duke storage ring is developed using EPICS. The control hardware employs several different architectures including CAMAC, GPIB, Allen Bradley, and VME. The high level control is implemented in Tcl-Tk scripts running on SPARCstations. TclTk provides the global control capabil...

At the Duke Free Electron Laser (FEL) Laboratory, there are two FEL machines: the Mark III infrared FEL and the OK-4/Storage Ring, which produces UV and XUV laser beam as well as gamma rays via Compton backscattering. The recent status of Mark-III machine is described in another paper [1]. Here we will concentrate on the new development of the OK-4/Storage Ring FEL and its performance and capab...

Department of Medicine, Duke University Medical Center, Durham, North Carolina, 27710, USA (D.P.S., L.M.W., R.T.S., S.A., R.J.L.); Department of Neuroscience and Pharmacology, The Panum Institute, University of Copenhagen, Copenhagen, Denmark (S.G.F.R.); Department of Molecular and Cellular Interactions, Vlaams Instituut voor Biotechnologie (VIB) & Structural Biology, Brussels, Belgium. (E.P., ...