Instrument Space Requirements Rob Connatser Chief Instrument Project Engineer November 2014

Overview Floor Space and Upgrade Zone Floor heights Crane hook heights Floor stability Floor loading Utility Galleries 2

Floor Space and Upgrade Zones Reference suite Upgrade Diagram 3

Reference Suite 4

Space Requirement and Upgrade Zones 5

Floor Heights – Objectives & Principles Utilize a common point of reference – target center line – and accept the variations from the placement of the moderators. A good working height for side access instruments is for beam to be between waist and chest height. It is easier & cheaper to raise the floor of an instrument than it is to lower it. Need to provide appropriate capability for angular coverage by detectors. 6

Floor Heights The Instrument Hall 1 floor in the south and west sectors, shall be 2.0 m lower than target center line. The Instrument Hall 2 floor in the north sector, outside the bunker, shall be 2.5 m lower than target center line. The Instrument Hall 2 floor in the west sector, shall be 2.0 m lower than target center line. The Instrument Hall 3 floor shall be 3.0 m lower than target center line The Guide Hall floor shall be at least 0.75 m lower than the bottom of the lowest moderator. 7

Floor Heights The Instrument Hall 1 floor in the south and west sectors, shall be 2.0 m lower than target center line. Short to medium length instruments in Hall 1, several of which will utilize side access. The Instrument Hall 2 floor in the north sector, outside the bunker, shall be 2.5 m lower than target center line. Short instruments in the north sector. Planning for instruments that need more space below beam, i.e., down angle (liquids reflectometer) and potential magnetic shielding (spin echo) The Instrument Hall 2 floor in the west sector, shall be 2.0 m lower than target center line. Generally only beam transport in this hall, but the possibility for upgrades in the future. Need to have common level with Hall 1. 8

Floor Heights The Instrument Hall 3 floor shall be 3.0 m lower than target center line. Capability for large vessel instruments with larger angular coverage. The Guide Hall floor shall be at least 0.75 m lower than the bottom of the lowest moderator. Primary objective was to reduce the amount of shielding required. However, sufficient space for technical equipment is required. 9

Cranes and Hook Heights Objectives and Principles ESS has an aggressive instrument installation schedule. Experience has shown that crane access can be a limiting factor. Sufficient capacity for load and space are needed to support the installation, operation, and maintenance of the instruments. Advice from similar facilities was to maximize hook heights. 10

Cranes and Hook Heights – Hall 1 Two cranes, of at least 30 T capacity, each having full coverage of the hall, including the high bay floor. A secondary javelin crane of at least 7.5 ton capacity shall provide coverage in areas not covered by the primary lifting devices, for each main crane. The javelin cranes shall be able to traverse and travel with a load in an extended position. The javelin cranes shall be able to pick loads in areas of the main hall to bring into the monolith/bunker area. Hall 1 hook height shall extend to at least 5.5 m from “target center line”. 11

Cranes and Hook Heights – Hall 2 Two cranes, of at least 30 T capacity, each having full coverage of the hall, including the high bay floor. A secondary javelin crane of at least 7.5 ton capacity shall provide coverage in areas not covered by the primary lifting devices, for each main crane. The javelin cranes shall be able to traverse and travel with a load in an extended position. The javelin cranes shall be able to pick loads in areas of the main hall to bring into the monolith/bunker area. Hall 2 hook height shall extend to at least 5.5 m from “target center line”. 12

Cranes and Hook Heights – Hall 3 Two cranes, of at least 10 T capacity, each having 20 m span coverage centered at 160m from the target center, and extending the full length of hall 3, shall be provided. Hall 3 hook height shall extend to at least 5.5 m from “target center line” 13

Cranes and Hook Heights – Monolith area Two cranes, of at least 20 T capacity, shall provide lifting capabilities in the areas around the monolith. 14

Cranes and Hook Heights – Guide Hall 5 T capacity crane coverage of the beamline areas in the guide hall shall be provided. Hook height shall extend to at least 6.0 m from the floor. Cranes shall cover at least a 5 meter span centered on the straight port lines that the neutron beamlines shall follow. 15

Floor loading Objectives and Principals Shielding is heavy Try not to break the floor Bunker – common shielding around the monolith Beamstops for thermal beams are large 16

Floor loading Objectives and Principals Shielding is heavy Try not to break the floor 17

Floor loading The area under the bunker needs to have a floor capacity of 30 tons per square meter. The floor capacity in the experiment halls needs to be 20 tons per square meter. The floor capacity in the guide hall needs to be 20 tons per square meter. 18

Floor stability The floor in the three experiment halls and the bunker area needs to be stable as loads move around in the facility due to maintenance, construction and changes in the instruments. NSS has requested a floor stability that is consistent with 2 mm of elastic movement and 2 mm of creep/deformation over the lifetime of the facility. To support cost reductions, NSS has accepted that the instrument hall floor stability will be consistent with 3 mm of elastic movement and 3 mm of creep/deformation over the lifetime of the facility. 19

Utility Galleries Why Size of facility Location 20

Utility Galleries Objectives and Principals Instruments need a variety of utilities all along the length of the instrument. Conventional Facilities need to be able to deliver these from a single source. A plan for doing so without blocking floor routes or crane access is critical. Flexibility and appropriate capacity is necessary for the long term capabilities of the facility. 21

Utility Galleries 22 Under slab galleries provide the option for bringing only the desired utilities to the instruments at convenient locations. Generally this will also prevent issues of blocking access.

Questions? 23

Bunker 24

Bunker 25

26 Bunker concept

Cranes and Hook Heights – Guide Hall 27

Floor Loading – Guide Hall 2m Minimum 1m Maximum height 1.7m Maximum width 1.7m Chopper shielding half steel & half concrete densitywidthlengthheightareaweight wall wall corners gap fill roof area floor loading

Floor loading - Beamstop The large beamstops needed for straight instruments will include a core component consisting of a thermal-neutron absorber surrounded by a steel and lead outer core. This core will be surrounded by high density concrete. 29

Floor stability Our initial requirement is that the beams are of the order of +/- 50 microns to achieve reasonable transmission. This was astronomical in cost, so we relaxed our requirement to "the same as the SNS". Discussion at this time talked about a 2 mm alignment uncertainty (latest data suggests this is optimistic). CF then informed us that 3 mm (elastic) + 3 mm (creep over 10 years) was compatible with the budget and the geology. This statement was accepted as the working parameters of the project. Subsequent efforts that are relevant: we decouple the floor loading from the optics, since the optics sit on bridged piles, we expect less than 6 mm shift on the optics. We study passive alignment concepts (only works with small shifts, not 6 mm). Metrology department involved (crude estimate of up to 1 M Euro for xyz alignment tracking per 150 m beamline). We are aware of patented methods of active alignment, but this technology was not yet trusted at JPARC despite being installed it has not been used after hot commissioning. Metrology dept continuing with more accurate cost analysis, in progress. 30