Hl-Lhc Triplet FSI target

Target on short support Ball clamping spring (3D printed) Glass ball reflector Heat reception plate (Al, colloidal graphite painted) MLI „colorette” Target on short support Insulator 3D printed Impact protection ring (3D printed, used also to attach the cold mass MLI from outside) Internal reflection layer COOLCAT BR-50 (reflects the radiation emitted from insulator support backward) Heat transfer route Heat transfer route Target on long support

Upper targets – LONG support MLI finish MLI finish Groove for cold mass curvature and support orientation set-up

Lower targets – SHORT support MLI finish MLI finish Groove for cold mass curvature and support orientation set-up

Targets supports integration (side cryosyostat targets): - For design purposes, glass ball position shall be integrated 9.9mm/2=4.45mm towards cryostat end from the glass ball – flange axis intersection. Cold mass contraction coefficient 2.94mm/m (300K -> 2K) -> Expected contraction: 3.352m x 2.94mm = 9.9mm Tooling: - Inox 304L support + Dummy target with BMR for support welding 9.9mm 4.45mm

Cold mass radius Always towards cryostat end Groove for cold mass curvature and support orientation set-up Supports positioned always with single threaded hole (over the middle of the groove) towards cryostat end

Target support + insulated target (long version): Target support (long version): Target support + BMR (long version):

Thermal shield masking plates Thermal shield contraction: 4.15mm/m (300K -> 2K) -> 3.352m x 4.15 = 13.9mm Cold mass contraction 2.94mm/m (300K -> 2K) -> 3.352m x 2.94mm = 9.9mm Difference 13.9 – 9.9 = 4mm (shift of thermal shield hole vs. insulated target).

Thermal shield contraction: 4.15mm/m (300K -> 2K) -> 3.352m x 4.15 = 13.9mm Cold mass contraction 2.94mm/m (300K -> 2K) -> 3.352m x 2.94mm = 9.9mm Difference 13.9 – 9.9 = 4mm (shift of thermal shield hole vs. insulated target).