Dipoles and quadrupoles are common in many different fields, especially in the control of charged particle beams. The picture above shows the field from a quadrupole device developed for the control of particle beams at the HERA accelerator in Hamburg, Germany. While the field stength plotted here is actually for a magnetic quadrupole, the shape and dependence is the same as that from an electric quadrupole.

Week 8 - October 13-17:

• CHECK OUT THESE LINKS for simulations to show vector fields in 2D and 3D and another (emstatic) in 2D.
  
  
• OFFICE HOURS THIS WEEK: Monday office hours with Prof. Dubson are next to the Duane Helproom, G2B88, from 3:30-5pm. Tuesday office hours with Prof. Kinney are also in G2B88 and run from 4-5:30pm. If you cannot come to one of these sessions, send one of us an email, and we'll try to find another time.
  
  
• WRITTEN HOMEWORK: HW #7 is due Wednesday Oct 15 in class as usual. All problem sets can be found at the assignments link (always available on the sidebar). The average score for each graded HW set is also posted there.
  
  
• READING: We are working on Dielectric materials this week. Read all of Chapter 4.
  
  
• TUTORIALS: Tutorial #7 is this Friday (Oct 17) at 3pm at the G2B tutorial bay G2B75. All tutorials are posted on the assignments page.
  
  
• HW SOLUTIONS: Solutions are posted on our CULearn page.