MAX I is the first storage ring at MAX-lab, commissioned 1986. The ring items were mainly produced in-house (magnets, vacuum system etc) and the construction of this ring and its injector was our first experience in accelerator construction.
The magnet structure is of the Chasman-Greene achromat type, although some dispersion remains at the straight sections of emittance reducing reasons.
After commissioning, the MAX I ring stimulated synchrotron light science in Sweden. As most, some 7 beam-lines were connected to this ring. Today, the synchrotron light activity is merging over to the MAX III ring, which offers a higher performance.
In the pulse-stretching mode (used for experiments in nuclear physics) the electron beam is injected from the injector situated below the MAX I ring via a Lambertson injection septum. The electron pulse, (200 ns long) is wound up in two turns in the ring. These electrons are the extracted gently during the next 100 ms, when a new electron pulse is injected. The electron beam is thus stretched a factor of 500 000.
|
Circumference (m)
|
|
32.4
|
|
Synchrotron light mode
|
|
|
|
|
Injection energy (MeV)
|
200
|
|
|
Operating energy (MeV)
|
550
|
|
|
Ring current (mA)
|
250
|
|
|
Beam life-time (Ah)
|
0.5-1
|
|
|
Hor Emittance (nm rad)
|
40
|
|
Pulse-stretching mode
|
|
|
|
|
Operating energy (MeV)
|
150-200
|
|
|
Extracted beam current
|
10 nA
|
|
|
Duty factor
|
80%
|
