Fa'asologa o Tau maneta ose Lalolagi (250318)

Saina Spot Maketi – Rare Earth Magnet Materials Upusii i Aso Taitasi, Na'o Fa'amatalaga!

▌Fa'amatalaga o Maketi

Pr-Nd Alloy

• Va'aiga o iai nei: 543,000 – 547,000
• Tulaga Tau: Tutumau ma vaapiapi fesuiaiga

Dy-Fe Alloy

• Va'aiga o iai nei: 1,630,000 – 1,650,000
• Tulaga Tau: E lagolagoina e manaoga mautu le agai i luga

Superconducting Magnets i MRI: Sa'o & Fa'afouga (598 chars)
O su'esu'ega MRI fa'aonaponei e fa'alagolago i le niobium-titanium (NbTi) superconducting coils fa'amalieina e le helium vai e gaosia ai fanua 1.5-7T. Tulaga taua:

• Tulaga tutusa: Fa'asa'o ≤0.5ppm vili fa'ailo malosi e fa'aaoga ai fa'afanua B₀ taimi moni (TR=2ms)
• Pulea tineia: Fa'ato'a fa'amama fa'amama fa'alava e fa'amama le malosi 15MJ i le 0.3s i le taimi e fa'aletonu ai le vili.
• Cryogenics: O cryocooles tapuni ta'amilosaga e fa'atumauina le 4.2K fa'atasi ai ma le <10⁻⁶ W/㎡ le vevela

Fa'ailoga fa'atinoga:

• Nb₃Sn vili: Ausia le 21T @ 15K (Brookhaven Lab 2024), mafai ai le ultra-high-field MRI
• faiga e leai se boiloff: Teu le 1500L helium mo le 10+ tausaga e ala i le pusaaisa maneta (tekonolosi maua mai NASA)
• Ata fa'ata'ita'iina AI: A'oa'oga loloto toe fausia 0.5mm切片图像 mai le 50% fa'amatalaga mata'utia (缩短扫描时间42%)

Alamanuia mataupu: Siemens '7T Terra faiga fa'aitiitia leo leo leo i 85dB (vs. 110dB常规MRI) e ala i le fa'aleaogaina vibration malosi, fa'aleleia le fa'amafanafanaga ma'i.