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f1 hsl degrader 1 [642k]

f2 slit box [645k]

gap q3 q4 [615k]

f1_hsl_degrader_1.jpg: Looking downstream into the box housing the F1 horizontal slits and the degrader wheel. Normally the beam blocker/gate valve body fits between the two flanges, but it has been removed pending replacement with a more reliable device. Only one of the slits is visible from this angle. The "no-degrader" position of the degrader wheel is set, visible as the circular aperture behind (downstream of) the slits.

f2_slit_box.jpg: Looking approximately downstream, a part of Q4 (white), Q5 (dirty and yellowish), and the box containing the horizontal slits at F2. The control cables for the (long since removed) vertical slits are unattached on the top flange. B2 is partly under the next block, bending beam to the left.

gap_q3_q4.jpg: Gap between Q3 (upper right) and Q4 (lower left), showing space into which a Hall probe would have to be inserted in order to get it into the pole tip gap in Q3.