View through the permanent #magnets in the hadron therapy test beamline mentioned in <a href='https://www.bnl.gov/newsroom/news.php?a=222471'>https://www.bnl.gov/newsroom/news.php?a=222471</a> .  The innermost surface of each permanent magnet wedge piece is visible: they cover the whole perimeter of the aperture to get the maximum field.    #physics #accelerators<p><a href='posts/202507/post-20250717-141211-a.jpg'><img src='posts/202507/post-20250717-141211-a.jpg' loading='lazy' /></a></p>