Insertion Devices

Parameters

The main parameters of the ELETTRA insertion devices are listed in the following table:

ID	s.s.	Pos.	Period (mm)	Np	Length (mm)	Bo (T)	K	Ptot (kW)	Pd max (kW/mrad2)	gap (mm)
U4.6	2	-	46.00	98	2 x 2254	0.921	3.96	3.9	6.2	13.5
U12.5	3	-	125.16	3 x 12	3 x 1501.92	0.533 0.506	6.23 5.9	1.3 1.2		29 (design) 32  (actual)
U12.5	6	-	125.16	3 x 12	3 x 1501.92	0.74 0.570	8.6 6.66	2.5 1.5	1.8 1.4	19 (future)  29 (design) 30  (actual)
U8.0	7	-	80.36	19	1526.84	0.897 0.710	6.73	1.2 0.8		20 (design) 26  (actual)
W14.0	5	-	140.0	3 x 19 poles	~3 x 1500	1.607 1.501	21.01 19.63	8.6 7.5		20 (design) 22  (actual)
EEW	4	-	212.0	16	3322	0.5 0.1	Ky=10.0 Kx= 2.0	0.6		Iv=160 A Ih=275 A
EU6.0	9	D	60.36	36	2150.3	0.781 0.419 0.510	Ky=4.40 Kh=2.36 Kx=2.87	1.3	1.9	19
EU12.5	9	U	125.00	17	2075.5	0.771 0.465 0.595	Ky=9.00 Kh=5.42 Kx=6.94	1.3		18.6
EU10.0	1	U D	100.36	2 x 20	1969.6	1.021 0.626 0.775	Ky=9.57 Kh=5.87 Kx=7.26	4.2 3.1 2.4	2.8   2.1	19
EU4.8	8	U	48.36	44	2091.12	0.584 0.296 0.343	Ky=2.62 Kh=1.34 Kx=1.55	0.7 0.4 0.3	1.7 0.5 1.0	19
EU7.7	8	D	77.16	28	2094.96	0.915 0.528 0.636	Ky=6.59 Kh=3.80 Kx=4.58	1.8		19
F8	10		140	2 x 16	~4400	0.75 0.14	Ky=9.81 Kx=3.56	2.8
SCW	11		64	49 poles	~1500	3.5	19.6	18.6	5.6	-
Short	12		56.36	17	~1000	0.5	2.63	0.3		25

Notes:
 
Ib=0.4A E=2 GeV
Pos. U = upstream, D = downstream
Ptot(kW)=0.6325*Bo*Bo*L*E**2*Ib                    (use Bo*Bo*2 for the helical case)
Pd max(W/mrad2)=5.42*Bo*E**4*Npoles*Ib       (linear polarization only)

Abbreviations and symbols:

	PM	Permanent Magnet
	HYB	Hybrid
	EM	Electomagnetic
	SC	Superconducting
	Ky, Kh, Kx	deflection parameter for horizontal, circular and vertical polarization modes