09A2　U50 - Spectroscopy

The optical layout of beamline BL09A

Optical Parameters

	Vertical Focusing Mirror VFM	Entrance Slit (S₁), Exit Slit (S₂)	Grating (G)	Vertical Refocusing Mirror (VRFM)	Horizontal Refocusing Mirror HRFM
Source-Element Distance (m)	12.5	14.0 19.7 ~ 20.7	15.7	24.3	24.9
Deviation Angle (2θ)	177°	N/A	174°	176°	174° (branch 1) 176° (branch 2)
Type	Sphere,water-cooled	Bilaterally adjustable, water-cooled	Sphere,water-cooled	Sphere,bendable	Sphere × 2, (bendable for branch 2)
Size (L × W × H) (cm)	30 × 3 × 3	H: 0.5 ~ 2 cm V: 0 ~ 1000 μm	18 × 2.5 × 2.5	50 × 5 × 7.5	50 × 5 × 7.5
Beam Footprint (cm × cm)	36.5 × 0.25	10 × 0.7	8.5 × 0.7	0.7 × 0.7	28 × 1.1
Coating	Au		Au	Au	Au
Substrate	SiC/Glidcop		SiC	ULE	ULE
Curvature (m)	104.2		55.5	110 ~ 160	110 ~ 160
Slope Error (FWHM, arcsec)	0.2		0.2	0.5	0.5
Roughness (RMS, Å)	2		2	5	5
Ruling Profile			Laminar Mask 1:1
Ruling Density (ℓ/mm) Ruling Depth (Å)			285 400 800 1600 210 150 80 40