| Magnet Unit(s) | 8012 |
|---|---|
| Typical BDES | 0.022 kGm |
| Typical Current | 10 A |
| Typical PS Voltage | <10 V |
| Nominal Beta X | 200 m |
| Nominal Eta X | -0.1 m |
| Nominal Beta Y | 410 m |
| Nominal Eta Y | 0 m |
HER VCOR1R is a vertical steering magnet near the interaction point.
It is a little unusual that a steering magnet has an "LGPS" designation. For several of the steering magnets near the IP the LGPS designation comes from the fact that their steering function is combined with a modeled deflection. This is the case in HER IR2 for the VCOR1L, VCOR1R, BLF, and BLFM magnets.
This category of magnet has "dual database" where one magnet type (LGPS for the modeled bending) shares a physical magnet and power supply with another magnet type (XCOR or YCOR for steering). "Dual database" magnets have software complications outside the scope of this document.
For the VCOR1L/VCOR1R magnets, the modeled bending arises from the fact that the HER beam traverses the BaBar solenoid field horizontally off axis. Since the solenoid fringe fields couple X offset into Y deflection, these two vertical dipoles are used to compensate this vertical deflection.