粒子加速器内部剖面图

一张圆形粒子加速器隧道截面等距工程剖面图，物理科普杂志风格。弯曲圆柱形隧道斜切展示内部：浅灰混凝土外壁；两条并行不锈钢束流管（冷银色）沿隧道轴延伸，红色箭头顺时针、蓝色箭头逆时针；超导偶极子磁铁为带铜螺旋线圈绕组的钴蓝矩形块；绝热层为同心银色与淡金色环。隧道地板有仪器电缆与真空泵细节。顶部标注 「50 m section」。工业色系：钢铁灰、钴蓝、铜色、冷白。Nature Physics 或 CERN Courier 双页插图风格。

An isometric engineering cut-away diagram of a section of a circular particle accelerator tunnel, styled as a technical illustration for a physics outreach magazine. The tunnel is shown as a curved cylindrical bore cut diagonally to reveal its interior. The outer concrete wall is light grey. Inside the tunnel, two parallel beam pipes are shown as narrow stainless-steel tubes (cool silver) running along the tunnel axis, one carrying protons clockwise and one counterclockwise (indicated by directional arrows in opposing colours: warm red clockwise, cool blue counterclockwise). Surrounding the pipes, superconducting dipole magnets are shown as large blue rectangular blocks with coil windings visible as tightly wound copper spirals. Cryostat insulation layers are depicted as concentric rings of silver and pale gold. Instrumentation cables and vacuum pumps are sketched as small detail elements along the tunnel floor. Overhead, a scale reference bar reads "50 m section". The colour palette is industrial: steel grey, cobalt blue, copper, cool white. No fictional branding. The style is that of a Nature Physics or CERN Courier magazine double-page spread illustration.