Version v2 is modified to document decision to use SmCo magnets at the more sensitive places in the Adv LIGO suspensions and NdFeB magnets elsewhere. It also documents where BOSEMS and LIGO 1 OSEMs are used.
Version v3 is modified to note that SmCo will be used everywhere that dynamic control signals are applied.
Version v4 is modified with two updates:
1) revised size of the HLTS lowest mass magnets, now 2 mm x 0.5 mm, making them the same as used on the lowest mass of the HSTS.
2) a statement that for eddy current damping applications NdFeB magnets will be used.
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