Machine Design

User Driven

The design of the Canadian Light Source (CLS) lattice was driven by the needs of the Canadian synchrotron radiation user community.

The Natural Sciences and Engineering Research Council's (NSERC) peer review panel described the machine design as "well conceived" and felt that there was "no doubt that such a machine could achieve the stated design performance."

Competitive Design

The CLS consists of a 250 MeV electron linac, a booster to ramp the beam to 2.9 GeV, and the main ring which is designed to operate at an energy of 2.9 GeV and at currents up to 500 mA. For general synchrotron information see http://www.lightsource.ca/education/whatis.php.

The CLS is a competitive design in a small package. The ring lattice is based on the double bend achromat (DBA) cell.  The peak design energy of 2.9 GeV is achieved in a machine with a circumference of 171 m. The emittance is 18.2 nm-rad. This is a respectable performance for a ring of such small circumference and is comparable to other light sources in the same energy range.

 

Full cell of the CLS DBA lattice - with two ID chambers

An optimization of the focusing properties has been done to achieve a suitably low emittance while maintaining a relatively small machine circumference. The effective emittance is optimized by placing a small amount of dispersion in the straights reserved for insertion devices.

Brightness of the CLS is comparable to other "3rd generation" sources of similar operating energy.

• Brightness for Phase 1 insertion devices

Twelve straights (9 available for insertion devices), 24 bending magnets, and over 40 possible beamlines are more than enough to satisfy the needs of the Canadian community of SR users for years.

At least two straights will have superconducting wigglers installed in them. The other straights will be chicaned to allow two insertion devices to be installed to produce photon beams with an angular separation of about 1 mrad. Photons from the two undulators will share the same front end and be separated into individual beamlines outside the storage ring wall. The CLS lattice allows the use of in-vacuum undulators with gaps down to 5 mm. See Insertion Devices page.

With > 300 mA stored beam currents anticipated this year, the CLS will provide brightness and flux to satisfy the Canadian synchrotron research community.

Last modified: 2008-07-29 14:07:38