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SLACspeak Terms

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X
cross.
X Corrector
See XCOR.
X Recommendations
The CCITT documents that describe data communication network standards. Well-known ones include: X.25 Packet Switching standard, X.400 Message Handling System, and X.500 Directory Services.
X Window System (TM)
A popular window system developed by MIT and implemented on a number of workstations.
X-COW
Two work stations used as a COW. One of the stations is used for display only, the other for a cursor selectable menu (uses DECXWINDOW).
X-Ray Screen
A profile monitor off the beam path where x-rays created by a synchrotron radiation source hit some material to generate secondary emission of visible light. The light itself is recorded by a video camera and transmitted by cable to MCC. This type of beam monitor is used extensively in storage rings where anything placed in the beam path would kill the stored beam.
X-Windows
A standard protocol for computer display windows and graphics developed by MIT and available for most computers. DECWINDOW is the version for VAXes and microvaxes, MACX is the version for MACs.
X/Open
A group of computer manufacturers that promotes the development of portable applications based on UNIX. They publish a document called the X/Open Portability Guide.
XAFS
X-ray Absorption Fine Structure.
XANES
X-ray Absorption Near Edge Structures.
XAS
X-Ray Absorption Spectroscopy.
XBBM
X Length Bunch Monitor.
XCOR
X CORrector. A small dipole magnet acting in the horizontal plane. Sometimes an XCOR is a trim winding on a larger bend magnet.
XCS
X-ray Correlation Spectroscopy (LCLS).
XEBC
Xenon bubble chamber.
XENIX
A version of UNIX from Microsoft, now from SCO (Santa Cruz Organization).
XENON
Experiment proposed in 2002 using the dual phase tipe projection c hamber approach to detech WIMP dark matter directly.
XES
eXperimental End Stations. (LCLS)
XES
X-ray Experimental Systems. (LCLS)
XFD
eXperimental Facilities Division (LCLS).
XFDSO
eXperimental Facilities Division Safety Office (LCLS).
XFEL
X-ray Free Electron Laser.
XFO
X-ray Facilities Operations. (SLAC)
XIP
X-ray Improvement Project. (LCLS)
XKMS
XML Key Management System.
XLAM
X-ray Laboratory for Advanced Materials. Name changed to SIMES in 2008.
XLDB
eXtremely Large Databases (workshop).
XM-2
Soft X-ray microscopy facility (ALS).
XMC
X-ray Monte Carlo.
XML
eXtensible Markup Language. A pared-down version of SGML, designed especially for Web documents. It enables designers to create their own customized tags to provide functionality not available with HTML. For example, XML supports links that point to multiple documents, as opposed to HTML links, which can reference just one destination each.
XMM-N
X-ray Multi-Mirror Mission - Newton. Launched by an Ariane 504 on December 10, 1999. (ESA)
xmosaic
An X11/Motif WWW browser developed by National Center for Supercomputing Applications (NCSA).
XPCS
X-ray Photon Correlation Spectroscopy
XPP
X-ray Pump Probe (LCLS).
XPS
X-ray Photoelectron Spectroscopy
XPSCL
X-ray Phase Safety Checklist. (LCLS)
XPUS
Interchangeable Processing Units.
XRB
X-Ray Background
XRF
Biological rapid scanning (imaging technique).
XROOTD
A highly scalable architecture for data access.
XRT
X-Ray Telescope.
XSPRT
cross SuPpoRT.
XSS
cross-Site Scripting. (Computing)
XT
X Toolkit Intrinsics. A C library to create and use interface components called "widgets" to build GUIs. Pre-built collections of widgets are available like the Motif widget set. XT provides a higher level of screen and input manipulation than the Xlib C library.
XTC
eXtended Tag Container.
XTCAV
X-band radio frequency deflector.
XTH
X-ray Transport Hall. (LCLS)
XTOD
X-ray beam Transport, Optics and Diagnostics.
Xyplex
One of the two local network servers to communicate between the VAXes and the terminals. Xyplex is a brand name for this connection box.

Send corrections to jmdeken@slac.stanford.edu or propose new terms for SLACspeak.

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