Method for manufacturing magnetism measurement device, method for manufacturing gas cell, magnetism measurement device, and gas cell
A method for manufacturing a magnetism measurement device which measures a magnetic field generated from a living body, includes: arranging an ampoule made of borosilicate glass and having a hollow part filled with a solid alkali metal, in a void in a cell section made of quartz glass, and then sealing the cell section; and casting a pulse laser beam on the ampoule through the cell section and thus forming a penetration hole in the ampoule. The pulse laser beam has an energy of 20 μJ/pulse to 200 μJ/pulse. The absorption coefficient of quarts glass for the pulse laser beam is lower than the absorption coefficient of borosilicate glass for the pulse laser beam.
1. A method for manufacturing an atomic oscillator, the method comprising:
arranging, in a void in a cell section made of a first glass, an ampoule made of a second glass different from the first glass and having a hollow part filled with a material, and then sealing the cell section; and
casting pulse light on the ampoule through the cell section and thus forming a penetration hole in the ampoule,
wherein the pulse light has an energy of 20 μJ/pulse to less than 200 μJ/pulse, and
the first glass has a lower absorption coefficient for the pulse light than an absorption coefficient of the second glass for the pulse light.
2. The method according to claim 1 , wherein
the pulse light is a laser beam.
3. The method according to claim 1 , wherein
the pulse light is ultraviolet light.
4. The method according to claim 3 , wherein
the pulse light has a wavelength range of 248 nm to 355 nm.
5. The method according to claim 1 , wherein
the pulse light has a pulse width of nanoseconds.
6. The method according to claim 5 , wherein
the pulse width of pulse light is 10 nanoseconds to 50 nanoseconds.
7. The method according to claim 1 , wherein
the material is an alkali metal.
8. A method for manufacturing a gas cell, comprising:
arranging, in a void in a cell section made of a first glass, an ampoule made of a second glass different from the first glass and having a hollow part filled with a material, and then sealing the cell section; and
casting pulse light on the ampoule through the cell section and thus forming a penetration hole in the ampoule,
wherein the pulse light has an energy of 20 μJ/pulse to less than 200 μJ/pulse, and
the first glass has a lower absorption coefficient for the pulse light than an absorption coefficient of the second glass for the pulse light.
9. An atomic oscillator manufactured by the method according to claim 1 .
10. The method of claim 1 , wherein the second glass is borosilicate glass.
11. The method of claim 8 , wherein the second glass is borosilicate glass.
12. A method for manufacturing an atomic oscillator, the method comprising:
arranging, in a void in a cell section, an ampoule made of borosilicate glass and having a hollow part filled with a material, and then sealing the cell section, the cell section being made from a first glass different from borosilicate glass; and
casting pulse light on the ampoule through the cell section and thus forming a penetration hole in the ampoule,
wherein the pulse light has an energy of 20 mJ/pulse to 200 mJ/pulse, and
the first glass has a lower absorption coefficient for the pulse light than an absorption coefficient of the borosilicate glass for the pulse light.
13. The method according to claim 12 , wherein
the pulse light is a laser beam.
14. The method according to claim 12 , wherein
the pulse light is ultraviolet light.
15. The method according to claim 14 , wherein
the pulse light has a wavelength range of 248 nm to 355 nm.
16. The method according to claim 12 , wherein
the pulse light has a pulse width of nanoseconds.
17. The method according to claim 16 , wherein
the pulse width of pulse light is 10 nanoseconds to 50 nanoseconds.
18. The method according to claim 12 , wherein
the material is an alkali metal.