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Elettra parameters


Elettra Parameters


Beam energy [GeV]   2 2.4
Storage ring circumference [m] 259.2    
Beam height in experimental area [m] 1.3    
Number of achromats 12    
Length of Insertion Device (ID) straight sections [m] 6(4.8 utilizabile per ID's)    
Number of straight sections of use for ID's 11    
Number of bending magnet source points 12    
Beam revolution frequency [MHz] 1.157    
Number of circulating electron bunches 1 - 432    
Time between bunches [ns] 864 - 2    
Tunes: horizontal/vertical 14.3/8.2    
Natural emittance [nm-rad]   7 9.7
Energy lost per turn without ID's [keV]   255.7 533
Maximum energy lost per turn with ID's [keV] (all)   315 618.5
Critical energy [keV]   3.2 5.5
Bending magnet field [T]   1.2 1.45
Geometrical emittance coupling % £ 1%    
Spurious dispersion (at the centre of IDs): horizontal (rms max/min) [cm] 6/2.    
Spurious dispersion (at the centre of IDs): vertical (rms max/min) [cm] 2/0.5    
Injected current [mA]   320 150
Machine dominated by the Touschek effect      
Energy spread (rms) %   0.08 0.12
Lifetime [h] (natural)
Lifetime [h] (with 3rd harmonic cavity)
  8.5
27
32
32
Bunch length (1 σ) [mm]*   5.4 7
Beam dimensions (1 σ)*      
ID source point - horizontal/vertical [µm]   241/15 283/16
Bending magnet source point - horizontal/vertical [µm]   139/28 197/30
Beam divergence (1 σ)*      
ID source point - horizontal/vertical [µrad]   29/6. 35/8.
Bending magnet source point - horizontal/vertical [µrad]   263/9 370/13

The values shown (taking into account the energy spread) are averages, obtained from a consideration of different angle and position values of the spurious dispersion and can vary by ±10%
Last Updated on Monday, 16 February 2015 11:16