The selection list is simply a list of images from various collections which is kept under your userid or machine name for up to 12 hours. To add new images to this list, browse the collection in which the images to be added reside and select images that you wish to add. To select images from this list, click on the select button. At the top of each browsing page, the search option allows a user to search the descriptions of the images in the current subcollection for keywords. This form uses the Glimpse search engine.
Patterns gives a description of the possible search patterns.
The magnets force the electrons into a snake-like path, so that the light from all the curves adds together. Although they are about 4.5 meters long and weigh about 40,000 pounds, the undulators have to be built to extreme precision. Many of the design tolerances are approximately 50 microns, less than the width of a human hair. Shown is the U10 passing above the U8 on the way to its new berth. To measure the magnetic field of an insertion device, the ALS designed and built a high-speed, precision magnetic measurement system.