| Line 37 was replaced by line 37 |
| - at about 150 mm for the coil center, we get the following: |
| + at about 150 mm from the coil center, we get the following: |
| At line 48 added 34 lines. |
| + |
| + |
| + |
| + ! Approximation of Forces (taken from OI Magnet Manual) |
| + |
| + As a rough guideline the following estimation can be made. |
| + For iron placed in a gradient of 500 G/m the force due to the field is equal to the mass of the object. |
| + For larger field gradients: Force = 10 * mass * gradB / 500 with Force, mass and gradB in (N, kg, Gauss/m). |
| + |
| + ! typical Field Limits for Common Devices |
| + |
| + The following devices should be kept outside these limits: |
| + |
| + |Field in Gauss| Device |
| + |1 | Motorvehicles, Elevators |
| + |10 | large steel equipment |
| + |30 | structural steel beams |
| + |
| + |
| + Fields larger than stated below might affect the following devices: |
| + |
| + |Field in Gauss | Device |
| + |1 | electro microscopes |
| + | |x-ray machines |
| + | |accurate scales |
| + | | image intensifiers |
| + |5 | pacemakers |
| + | 10 | credit cards |
| + | | watches |
| + |20| magnetic storage media (HDD) |
| + |50| magnet power supply |
| + | | Turbopumps (typically) |
| + |
| + |
LIN