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) |
+ |
+ |