Magnetic field and Bainbridge mass spectrometer

In summary, the electric field in the velocity selector of a Bainbridge mass spectrometer is 1.05 x 10^5 V/m and the magnetic field in both regions is 0.520 T. A circular path with a radius of 31.0 cm is formed by a stream of singly charged selenium ions in the magnetic field. Using the equation B=mv/qr, the mass of one selenium ion can be determined. Additionally, the mass number of the selenium isotope can be found by rounding the mass of the isotope to the nearest integer in atomic mass units (1 u = 1.66 x 10^-27 kg).
  • #1
Clement
6
0

Homework Statement


The electric field between the plates of the velocity selector in a Bainbridge mass spectrometer is 1.05 105 V/m, and the magnetic field in both regions is 0.520 T. A stream of singly charged selenium ions moves in a circular path with a radius of 31.0 cm in the magnetic field. Determine the mass of one selenium ion.

Determine the mass number of this selenium isotope. (The mass number is equal to the mass of the isotope in atomic mass units, rounded to the nearest integer. One atomic mass unit = 1 u = 1.66 10-27 kg.)

Homework Equations


B=mv/qr


The Attempt at a Solution


used formula E= kq/r^2 and found a q, but it says the particles are positively charged,
dont know how to continue without the velocity.
 
Physics news on Phys.org
  • #2
got it, thanks!
 

1. What is a magnetic field?

A magnetic field is a region in space where magnetic forces can be detected. It is caused by the motion of electric charges and is characterized by direction and strength.

2. How is a magnetic field created?

A magnetic field is created by moving electric charges. In the case of a magnet, the electrons in the atoms are all spinning in the same direction, creating a magnetic field. In other cases, electric currents can also create magnetic fields.

3. What is a Bainbridge mass spectrometer?

A Bainbridge mass spectrometer is a scientific instrument used to measure the mass-to-charge ratio of ions. It uses a magnetic field to deflect the ions and a detector to measure their positions, allowing for the calculation of their mass-to-charge ratio.

4. How does a magnetic field affect the path of ions in a Bainbridge mass spectrometer?

A magnetic field exerts a force on moving charged particles, causing them to follow a curved path. In a Bainbridge mass spectrometer, the magnetic field is used to deflect ions in a circular path, with the degree of deflection dependent on the mass-to-charge ratio of the ion.

5. What are the applications of a Bainbridge mass spectrometer?

Bainbridge mass spectrometers are used in a variety of fields, including chemistry, physics, and biology. They are commonly used to identify and quantify chemical compounds in a sample, analyze isotopic ratios, and study the structure of molecules.

Similar threads

Mass Spectrometer - Find Radial Separation of 58Ni+ & 60Ni+
    • Advanced Physics Homework Help
Replies
1
Views
1K
What I do not understand about mass spectrometers
    • Introductory Physics Homework Help
Replies
28
Views
1K
Mass spectrometer with a Lead element
    • Introductory Physics Homework Help
2
Replies
40
Views
2K
Carbon ions in Tandem Accelerator
    • Advanced Physics Homework Help
Replies
1
Views
1K
Mass spectrometer problem -- Need help
    • Introductory Physics Homework Help
Replies
3
Views
2K
How Is Current Calculated in a Mass Spectrometer?
    • Introductory Physics Homework Help
Replies
3
Views
1K
Charges of ions in a mass spectrometer
    • Introductory Physics Homework Help
Replies
1
Views
1K
Spring-mediated dipole in a magnetic field
    • Introductory Physics Homework Help
Replies
31
Views
1K
Distance between Isotopes in a mass spec
    • Introductory Physics Homework Help
Replies
8
Views
9K
Solving for Radius in Magnetic Field: q of Sr+?
    • Introductory Physics Homework Help
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top